Rule34.GG

Regular alien
autobot
blood
blue blood
blue eyes
bodily fluids
bumblebee (transformers)
cybertronian
decepticon
digital media (artwork)
duo
energon
erection
forced
gore
guro
humanoid
living machine
machine
male
male/male
male only
male penetrating
megatron
penetration
penis
rape
red eyes
robot
sex
simple background
size difference
smile
teeth
transformers
transformers prime
unknown artist
unusual blood
wounded