Rule 34 Dev - all_fours anthro ass balls black_hair canid canine duo erection felid feline fluffy fluffy_tail fox fur genitals grey_body grey_fur hair hi_res hot_dogging humanoid_genitalia humanoid_penis james_(knell_bell) knell_bell male male/male mammal niko_(xintro) nude penis serval sex tail tan_body tan_fur|9467133208