FURVERT!

against_surface animal_genitalia animal_penis balls belly belly_on_glass big_balls big_belly big_penis deer equine_genitalia equine_penis erection genitals hi_res humanoid_genitalia humanoid_penis hybrid_genitalia hybrid_penis knot knotted_equine_penis knotted_humanoid_penis knotted_penis male male/male mammal navel on_glass outie_navel pascal_(artist)penis potion sam-e synth_(vader-san)tai_samar vore