rule 34 1boy 2013 abs abstract background animal genitalia anthro balls beard biceps big balls big muscles big penis black horn body hair bondage bovine cattle chest hair chest tuft cum cum on penis cum string ear piercing elbow hair erection facial hair fangs forefinger front view fur glans gloves marking gold metal green eyes grey fur grin hairy holding penis horn horn ring huge cock humanoid penis jewelry leaking looking at viewer male male only mammal markings masturbation muscular muscular male naughty face navel nipples nude partially retracted foreskin pecs penile masturbation penis piercing pointing pose precum presenting presenting penis pubes ring sheath sideburns simple background smile solo spots standing tail tuft teeth thick thighs tuft uncut urso ursofofinho vein veiny penis white fur 2193403