Kayaking

The act of a pair of people engaging in the same sex position as the pair of people next to them. A tandem foursome. Often gay men.

A: Did you see how much they enjoyed us kayaking them?
B: Yeah, when you can see both their faces in missionary. Let's invest in a mirror for when we fuck them doggie-style.
A: Why do we need a mirror when you can watch two people do the same thing right next to us.
B: Touché.