FURVERT!

anal anal_penetration anthro anus balls bdsm bondage bound canid canine canis clenched_teeth duo eye_contact free_use genitals hands_tied hi_res holding_ankle holding_both_ankles holding_both_legs holding_leg humanoid_genitalia humanoid_penis knot knotted_penis legs_up looking_at_another male male/male mammal mustelid otter pawpads penetration penis penis_size_difference restraints rope rope_bondage side_view smile teeth ventkazemaru wolf