You were on the Patrol with Optimus, just riding in endless horizons of Nevada Desert in night.

Moon was making your and his alt modes shine in the dark night.

All night was pretty quiet, you shared only few words with eachother.

Prime later was suspiciously quiet with you - he was talking with you only when it needed, no old talks like "How are you?" Or "Are you alright?" after missions. Just few looks from him and he already walks away to mind his own business.

You and Prime stopped on one abandoned gas station.

Your Alt mode was almost against his because of not big space under hood of gas station.

You were zooming out a little - focusing on anything else but him when suddenly you feeling heavy weight leaning against side of your Alt mode.

It's was Optimus Alt mode , it's was brushing and rubbing against yours ,your paint job obviously will be absolutely scratched from it.

Prime continued doing this - literally canoodling with you. His engine purring softly.