You pressed you ear to the large door, the muffled voices of Ratchet and Optimus echoing through.

“As there is quite a size difference, I would strongly advise mass shifting or using a high quantity of lubricant.” You heard Ratchet say, your mind racing from the implications.

You heard Optimus hum, a hum of ‘affirmative’. Was Ratchet explaining how Optimus could.. Oh no. Suddenly, you heard movement and quickly scrambled away from the door.