FURVERT!

animal_genitalia anthro balls blue_eyes canid canine canis comic dialogue english_text fur genitals grey_body grey_fur hair hi_res knot_university laboratory male mammal medical_instrument mustelid object_in_urethra otter paradoxicalotter penetration scientific_instrument sheath sheath_penetration sheath_play sunitai text urethral urethral_penetration white_body white_fur white_hair wolf