Rule 34 Dev - balls blindfold bondage bound camychan cock_ring cutie_mark electrostimulation equine erection fan_character feral flared_penis forced frost_bright fully_bound gag gagged horn letterbox locked lying machine male mammal medial_ring milking_machine my_little_pony on_back penetration penis penis_milking sensory_deprivation sex_toy solo straitjacket unicorn urethral urethral_insertion urethral_penetration vibrator vibrator_on_penis|2783418288