Dad's Experiments
It had been a while since I visited Dad. I got a call last night and he was all excited, talking about one of his latest experiments and how he's made some huge breakthroughs, but he'd need my help. He could barely contain himself over the phone, it was hard enough to get him to spit out with when I needed to go see him and for how long. Was pretty surprising hearing a big ole' German Shepard like Dad get so excited about whatever it was. He loves his work but he could hardly talk straight.
Once I finally got it out of him that I needed to come over for the next week I put in my vacation days at work and hopped on a train. He needed me the next day, or in his words, "as soon as possible! Tomorrow if you can get here!" Good thing I only lived about an hour a way, so I was there by lunch time. I met him at our favorite old place to eat and we got a quick bite before heading back home. He tried to explain to me the whole time about what he was doing but fuck if I could understand any of it. Somethin' about protein folding and DNA structures and similar DNA patterns and samples and all that shit. I didn't care, but all I knew is that while he was talking about certain parts of it like the word "samples", he had that smirk on his face and I was startin' to understand what he meant. He drove me back to his lab at home, still explainin' everything on the way there, tryin' harder and harder to get me to understand what it was he was doing, but it wasn't happening. I'm a mechanic, not a scientist, so all I was starting to understand was what he needede me to do. And his hand rubbin on my knee and leg the whole way home certainly got the point across.
Once we got there and Dad brought me in his private little lab at the back of the house, he showed me this crazy lookin' table. There were straps on it and this things to stick your ankles in, straps on those too, and the whole bottom section of the table was cut out. I was definitely gettin' the point now. I followed his instructions and started strippin' down while he turned on some computers and fiddled with knobs and buttons. I piled all my clothes on a table nearby, but once I was down to my boxers, I felt him sneak up behind me. He wrapped an arm around my chest and scratched my chin while I leaned back into him. Fuckin' hell, he had a pair of rubber gloves on. Just the powdery smell of those things was gettin' me hot, remembering all the times we had together with a pair of those things on, covered in lube...or the "special occasions" where the gloves came off. His other hand slipped down my front and cupped my junk, rubbin' at my balls and the inside of my thighs. I was gettin' hard fast now, and then he told me in his special "in-charge" voice to lay down on the table.
I did as I was told and laid back, a nice tent on my boxers standin' up at attention, while he fastened the straps around my wrists above my head. Then he moved to slide my boxers down, takin' a bit extra time to lean forward and stick his muzzle right in there, gettin' a good whiff o' my balls and givin' my cock a playful little lick as he pulled my shorts off and threw em aside. He didn't stop there though and started lapping at me, makin' me moan and cringe while the straps held me down. After a minute or so of this my dick was all lubed up with his tongue, and he pulled away to work on the table some more. He lifted my legs into the stirrups and strapped 'em down, then he reached up above the table and pulled down this tube attached to a big machine with hoses and wires comin' out of it. He pushed a couple buttons on it and it whirred and beeped and whistled and the tube started pulsating, moving up and down slowly and steadily in his hand. He pulled it down towards me and gently slid my cock into the tube. It was lined with some kind of rubber, soft and warm and slippery. I immediately started groaning while he worked me over with this thing, milkin' me slowly and steadily, his other hand rubbin' on my balls and down towards my tailhole, slowly pokin' at it and gently slidin' a couple of fingers in.
Shit, I wasn't gonna last long like this. While he was pumping my dick into this thing he explained how he needed samples from two people who were related. Then he started telling me how he did himself the day before. Fuck did he start tellin' me, all in slow detail while my cock was bein' milked by this thing. How he set up the machine on the table for him to hump, how he set up a fuckin' machine to pound him under his tail from behind with a dildo he molded from my own cock, stretchin' out his hole and bouncin' his balls around. God damn just picturin' that was givin' me shivers. His fingers kept on slidin' in and out of my ass and he was startin' to hit me right where it counted. "Come for me, son" he said, "come for Daddy and be a good boy" in that damn voice a' his, different from the way he usually talked, he knew how it got me when he talked like that. I was about ready to blow right into that machine, callin' out to him "almost there, Dad", and he pushed his fingers as far as he could, and that pushed me right over. I cried out like the first time he ever got me off and blew my load into the machine, my eyes squinting and holdin' my breath and my tail curlin' up around his arm, feelin' like my whole body was bein' sucked out of my dick. Fuck if it wasn't the best orgasm I'd had in a long time. After a few seconds and it was starting to subside, I could hear the machine makin' more beeps and whistles. Dad pulled his fingers out o' me, callin' me a "such a good boy" an' shit while I was too busy catchin' my breath to respond, and with those wrist straps I couldn't flip him off like usual, would have made him laugh too. He pushed some buttons and turned some dials and the machine stopped moving, then he pulled it away and my limp dick flopped down onto my stomach, and he started undoin' the straps around my ankles and wrists. He started tellin' me, back in his regular ole' voice, it was a perfect sample, good quantity and how I must not have been fuckin' anyone or jerkin' off much lately. That time I did flip him off, and I got that laugh out a' him. He said we didn't need anything else that day, so I got dressed (with no help from him fuckin' gropin' me and grabbin' at my floppy dick and balls while I'm tryin' to put my shorts back on) and we went back to the main part of the house. Later that night certainly was fun too though, I got my revenge for his little "good boy" comments by suckin' his dick so hard he practically passed out, and while he was too weak from cummin' his brains out to move around I sat on his chest and blew another load right onto his muzzle. Serves him right, think I got 'im in the nose.
That whole week went about the same. He milked me half to death with that machine five or six times, including one time where he snuck a big purple rubber dildo on me, but fuck if I let him know how much I liked him poundin' my hole with that thing while he slurped away at my balls. I did think about swiping it and takin' it back home with me though, could make for some interesting pictures to send to his phone while he was at work, the bastard. That last day though...shit. It started out like usual, gettin' down to my birthday suit and layin' on the table while he worked on those machines, but this time he said was a little different. He told me to get up off the table and started takin' off his own clothes. He pretended to fiddle around with his machines while he was turned away from me, workin' off his big ole' white coat and office shirt, but I knew he was playin' at something when he started teasin' me with his big tail swayin' back and forth in my face while he slid off his shorts, his hole pointin' right at me and his balls floppin' down and swinging side to side. I was startin' to think he wanted me to fuck 'im, and I was plenty hard now thanks to his teasin', but he pulled away and pulled down that machine and laid down on the table. Somethin' was different about it though, the tube was larger. He told me, back to his deep, stern voice, to grab a nearby bottle of lube and come over there and lay my dick on his. Fine with me, now I understood. I lubed us both up real good and he positioned the machine, puttin' his own cock in first, and then tellin' me to slide mine in too. It was tight, we were pressed together real good with our balls rubbin' against each other, and he started up the machine. Good God damn, this was good. That thing pumped us both good while I grinded on him, our dicks massagin' each other in that warm tube. "Shit, old man" I said, "you should sell this thing, you'd make a killin'." He half grunted and half laughed while he gritted his teeth. That machine milked us both hard for a good long while until we were both goin' hard. He couldn't do much with me on top of him except hold that machine still as he could, so I made a point to pound it good while holdin' his thighs for dear life. We were both about ready to come soon, so he turned the machine all the way up, that thing bobbin' up and down on our cocks as fast as it could, I had to stop movin' so I wouldn't pop right out. Soon enough we both started explodin' into the thing, cryin' out like we were dyin'. I could feel his dick squirtin' and twitchin' on mine, and our balls were pullin' in together. Once we were both done, he pulled the machine off and I practically collapsed onto him, restin' my head on his chest while we both caught our breaths, him puttin' an arm around me. Once I could properly speak, I asked him what the point of that experiment was if he already had plenty o' samples from both of us. "Oh, that was just for fun", back to his normal voice with a laugh.