You don't get your nookie where you get your cookies.

The CEO of Boeing was just fired for some 'inappropriate behavior' with a female employee. Guess he didn't know the old maxim.... "you don't get your meat where you get your potatoes"-- or don't diddle the staff!

That's a good one. Along the lines of "Don't sh*t in your own nest." Do your diddling out of town (or outside the workplace).

You don't get your slash where you get your cash.