A dirtier, less known expression that mean's the same as "you can't have your cake and eat it, too."

In other words, you can't have everything you want. You get one thing, but you may not get the other.
Joe: Did you hear that Mike slept with Kelly?

Sam: Yea.

Joe: But she won't be his girlfriend.

Sam: "You can't have your pussy and eat it too"
by Russessabagina December 15, 2009
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