anal anal_sex big_penis big_sub cybertronian digital_media_(artwork) dildo domination elapuse erection huge_cock humanoid humanoid_penis kaon_(transformers) machine male multiple_penetration open_mouth penetration penis robot sex_toy simple_background size_difference small_dom smile spread_legs spreading sweat tesarus_(transformers) transformers urethral urethral_insertion urethral_penetration vibrator vos_(transformers)