Rule 34 Dev - anal anal_penetration anthro anus balls bdsm bondage bound clenched_teeth duo eye_contact free_use genitals hands_tied holding_ankle holding_leg knot knotted_penis legs_up looking_at_another male male/male pawpads penetration penis penis_size_difference restraints rope rope_bondage side_view smile teeth ventkazemaru canid canine canis mammal mustelid otter wolf hi_res|22275068480