FURVERT!

anal anal_penetration animal_genitalia animal_penis anthro anus backsack balls biped blue_eyes canid canine canine_genitalia canine_penis canis comic dialogue digital_media_(artwork)duo_focus enema english_text fully_sheathed fur genitals grey_body grey_fur group hair hand_on_shoulder hi_res internal knot knot_university laboratory male male/male mammal mustelid object_in_ass otter paradoxicalotter penetration penile penile_penetration penis penis_in_ass raised_tail sex sheath sunitai tail text white_body white_fur white_hair wolf