This is a sexual maneuver that prostitutes use to sexually please men.
The woman
will first strip naked and backbend into a bridge. She
will stay in that position for as long as the man wants. The man
will then remove his trousers and mount the woman in the backbend. He
will slide his dick into the "crack in the bridge" and they will begin sexual intercourse. When the woman climaxes, a spray of water from underneath the bridge will spew forward as a result of the backbend.
Mmmmm... Yummy, right?