rule 34 2012 anthro balls big balls big penis bodily fluids bondage bound brown body brown fur brown hair canid canine canis cum digital media artwork domestic erection freckles artist fur genital fluids genitals green eyes hair huge balls huge cock hyper hyper genitalia hyper penis male male only mammal mastiff molosser muscular muscular anthro muscular male nipples nude penis restraints rope rope bondage rottweiler simple background solo vein veiny penis wrists tied 8364988