Women use sex to men. They use guilt to keep them.
When I was getting married, nearly every man I talked to counseled me that marriage was more akin to a trap than anything else. The especially good men would just say that it involves a lot of sacrifice. Men simply have no clue that the thing they will be asked to sacrifice is exactly the thing they got married for in the first place.
Make that:
Women use sex to get men. They use guilt to keep them.