Most of the experience Sixshot has had with sex was limited to the physical variety and even then, usually pretty vanilla by Decepticon standards. Short too, due to time constraints or just plain nervousness on either his or his partner's part.

Spark play has never really occurred to him as a thing that could be done. The sudden bloom of pleasure suffuses his whole body and his mind goes blank, vision whiting out.

When the world comes back into dizzying focus, he finds himself on his knees forehead pressed against Tarn's abdominal plates, over-warm and gasping.

"Uhm."

How's that for coherent?