bdsm
bondage
bound
cybertronian
decepticon
digital_drawing_(artwork)
digital_media_(artwork)
erection
frown
genitals
hasbro
humanoid
humanoid_genitalia
humanoid_penis
kneeling
koch43
living_machine
machine
male
not_furry
overlord_(transformer)
penis
penis_bondage
raised_arm
red_eyes
restraints
robot
rope
rope_bondage
simple_background
solo
submissive
submissive_male
takara_tomy
transformers