Have your cock and eat it too.
The far-less-euphamistic version of "have your cake and eat it too;" An idiomatic figure of speech used to connote the idea of consuming a highly desired thing whilst managing to preserve it. This may also indicate having or wanting more than one can handle or deserve, or trying to have two incompatible things.
John: "I work at a law firm so I can make lots of money and get hot women, but then I work at a law firm, so I have no time to actually go out and find hot women."
Trisha: "You can't have your cock and eat it too."
John: "Don't you mean cake?"
Trisha: "Do I look like I eat cake?"
Trisha: "You can't have your cock and eat it too."
John: "Don't you mean cake?"
Trisha: "Do I look like I eat cake?"