3. “You can go to your reunion, but I don’t want you to exchange your phone number with girls.”
From your boyfriend’s perspective, this is like being told he can go to a lunch buffet but he cannot eat the dessert. He will eat the dessert if he wants to, and he won’t eat it if he doesn’t want to. Telling him what to do almost has the opposite effect. When told not to do something, we feel even more curious about what would happen if we did it.