rule 34 11 1futa 2021 alternate version at source animal genitalia animal penis anthro areola balls blue eyes bodily fluids book breasts digital media artwork dumbbell equestria girls equid equine equine penis erection exercise fingers furry futa only futanari genitals hair hasbro holding book holding object horn inside intersex kevinsano mammal medial ring multicolored hair my little pony nipples nude penis ponytail signature solo sunset shimmer sweat sweatdrop two tone hair unicorn vein weightlifting weights workout 6762849