Foghorn leghorn started it after he did a muscular pose for a gym shirt because he really liked that feeling but didn't have anywhere he could really let loose.
All the way through, Anal, Arnold, Arnold the pit bull, Art Gallery, Beach, Beerus, Big Bad Wolf, Biker Mice, Biker Mice from Mars, Blow Job, Blowjob, Bmfm, Bow ties, Bowser, Buff, Car, Cartoon, Cat, City, Club, Cock Fucking, Collars, Cuffs, Cum, Daffy Duck, Desert, Destroying, Destruciton, Digimon, Disney, Docking, Dog, Donald Duck, Dragon Ball Z, Explosion, Extreme Dinosaurs, Exveemon, Foghorn Leghorn, Foot Job, Footjob, Forest, Gargantuan, Giant, Gigantic, Gohan, Growth, Henry hawk, Hercules, Huey dewey and louie, Hyper, Hyperphallic, Inuyasha, Knuckles, Koopa, Leatherhead, Leomon, Leonardo, Lizard, Looney Tunes, Louie duck, Macro, Max Goof, Memnon, Mickey Mouse, Miles Prower, Modo, Monster, Mortimer, Mouse, Muscle, Muscle Growth, Muscle toon, Muscle toon planet, Muscles, Napoleon bonafrog, Ninja Turtles, Painting, Panthro, Pitu le pew, Plucky Duck, Rim job, Rimjob, Ripped Clothing, Robin Hood, SWAT Kats, Schnookums and meat, Sneezer, Sonic, Spike, Stegs, Street Sharks, Stretching, Sylvester, TaleSpin, Thong, Throttle, ThunderCats, Tiny Toon Adventures, Tom and Jerry, Trix rabbit, Turtle, Wilford Wolf, Yakko, Zootopia, animaniacs, beast, bernard, bugs bunny, crush, destroy, donatello, excessive cum, flexing, fold, goku, goofy, growing, hong kong phooey, jungle book, kouga, lifting, liono, michelangelo, muscular, pepe le pew, raphael, ripping, robe, shredding, smurfs, spats, stomp, t-bone, tails, tigra, tiny toons, tmnt, tony the tiger, toon, uniforms, vegeta, vinnie, volcano, wakko, warner brothers