What is the difference between how Gabi's mother treats Gabi and Beto when it comes to the idea of having sex?

Gabi's mother tells Gabi to keep her eyes opened and her legs closed when she goes out on dates, always admonishing her not to have sex. However, Gabi's mother tells Beto to take a condom with him when he goes out on dates, which Gabi sees as a double standard. Gabi resents this difference between her and Beto when it comes to how her mother treats the idea of having sex.