FURVERT!

anal anal_penetration anatomically_inaccurate animal_genitalia anthro ass_up autofellatio autofellatio_while_penetrated bdsm black_hair blue_eyes blue_pawpads bodily_fluids bondage bound canid canine canine_genitalia canis domestic_dog ed_(cactuslicker)electrostimulation feet_behind_head flexible folded full_viennese_oyster_position genital_fluids genitals grey_body hair heel_pad hi_res laboratory laboratory_equipment leaking_precum legs_behind_head legs_up lying male mammal masturbating_while_penetrated masturbation neysheli on_back oral oral_masturbation oral_penetration pawpads penetration penile penile_masturbation penile_penetration penis penis_in_mouth penis_in_own_mouth precum precum_on_own_penis scientific_experiment scientific_instrument solo tongue tongue_out viennese_oyster_position wolf