rule 34 anal anal fisting anthro anthro on feral anus balls biped bored canid canine canis claws deep fisting duo erection felid feral fisting fur grey background hybrid interspecies looking away looking back male male only mammal masturbation multicolored fur orange fur pantherine penis pink penis quadruped raised tail reluctant savvel sergal signature simple background spikes stomach bulge tapering penis thebatcove toe claws ursid wolf zeph zoophilia 3376124