'Teen Mom' Farrah Abraham and 'Celebrity Big Brother' alum Frenchy Morgan clearly had no idea cameras where trained on them as Frenchy grabbed a piece of Farrah's famous ass.

The thirsty pair were hanging at a Vegas pool Saturday, soaking up attention for anyone in the market to watch.

Farrah was there for the Backdoor Key launch party -- seriously.  It's a shindig a Crazy Horse III, a Sin City gentleman's club.

Good to know Farrah's rebounding in the cash department after losing money on her L.A. pad.