rule 34 alligator armpit armpit fetish azathura belly big penis black sclera claws color crocodilian dark blue fur ear piercing gay grabbing pecs green hair grey scales licking licking armpit male malemale male only mammal markings musclegut muscles muscular muscular arms muscular male nipples pecs penis piercing purple eyes purple penis raised arm rat reptile rodent scalie sharp teeth size difference tail 8125399