rule 34 43 5 fingers animal genitalia animal penis anthro anus autofellatio autopenetration ball tuft balls biped bodily fluids canid canine canine penis canis claws closed eyes conditional dnp erection fingers genitals knot male male only mammal masturbation muscular muscular male nipples oral oral masturbation oral penetration pecs penetration penile penile masturbation penis saliva silver fang solo tuft vein veiny penis wolf xenoforge 3715647