This is not a joke. Well, let me rephrase that: This is an actual ad. Depending on the size/resolution of your screen, you may need to click on it to read the wording.
This makes no sense to me at all! If she's into casual sex, fine.
Birth control pills are not that expensive - especially when you compare it to the price of dinner, a movie and a few drinks.Also, with her lifestyle, she may need the insurance to treat an STD.