Rule 34 Dev - anal anal_sex anthro anus ball_stretching barefoot bound bucket canine canine clenched_teeth cock_and_ball_torture defecating erection feces flat_colors fully_bound humanoid_penis male mammal pain partially_retracted_foreskin pawpads penetration penis rope rope_bondage rottweiler scat scrunchy_face signature solo straining suspension teeth toe_bondage toothpasta uncut|2377281416