FURVERT!

2018 4:3 all_fours anthro backsack balls biped black_hair butt canid canine circumcised clothed clothing collar collar_tag digital_media_(artwork)erection genitals glopossum hair humanoid_genitalia humanoid_penis jockstrap looking_at_viewer looking_through looking_through_legs male mammal partially_clothed penis penis_backwards presenting presenting_hindquarters simple_background smile solo topless underwear vein