rule 34 2018 abs absurd res alex jrbart all fours anthro anus ass back muscles backsack ball tuft balls black and white crocodile crocodilian facial piercing fangs genital piercing grass hi res jrbart looking back male male only monochrome muscular muscular male nose piercing outside perineum piercing pose presenting presenting hindquarters reflection reptile scalie scrotum piercing sharp teeth solo swamp tattoo teeth tree triceps water 3087001