Crossing the picket line

This comment in a discussion on the Duke rape case caught my eye:

We already have an economy of sex where the slut is a figure of contempt because she’s like a scab that refuses to honor the picket line (withhold sex and sexual displays in exchange for a real relationship, a socially approved, heteronormative relationship).

Do you think this is an appropriate analogy? If not, why not?

Even if you disagree with the premise, it is darn catchy.