Doggy Reach Back 

The Doggy Reach Back, or DRB for short, is a variation on the doggy-style sex position. The name come from when the female participant reaches her hand back between her legs to fondle the man's balls while he's giving it to her from behind.

I was fucking this girl and out of nowhere she gave me a doggy reach back so I came immediately.

Doggy Reach Back by Doggydawg March 22, 2007