rule 34 5 fingers abs animal genitalia animal penis anthro balls biceps big penis blue pupils canid canine canine penis canis claws dobermann domestic erection eyebrow piercing facial piercing fingers front view genitals gloves marking grey eyes hi res knot looking at viewer male male only mammal markings muscular muscular male nipples nude on sofa paxemerson pecs penis piercing pinscher pupils reclining sitting smile snout solo spread legs spreading tattoo white claws 4045799