Use of sex as a manipulative factor

Don't be fooled by the subject this one is funny. This time from Frasier.

So, Frasier is having this discussion at home with his brother, his father and his nurse about how he kissed his lady boss in a heat of passion after a very hot argument. Question as to motive is raised and someone suggests that she might be manipulating Frasier.
Frasier prepares to go back to the radio station and ask her what's going on. As he's leaving, Daphne, the nurse, comments that men have also used sex to get what they want.
Frasier as he is leaving, stops with his hand on the doorknob, and says in an exasperated voice, "How can we we POSSIBLY use sex as a means to get what we want. SEX IS what we want!"