5. Freaking out if he doesn’t call the next day. Most guys say they wait two to three days to call a girl. They do this because they don’t want to look too desperate, not necessarily because they don’t want to hear your lovely voice every night. Unless you usually talk to him every day, there’s no reason to think that just because you had sex you’re going to start. Bottom line: Don’t worry that you’ll never hear from him again if it’s only been a day since your romp and he’s been silent. If it’s been a week or two, however, feel free to freak out, egg his apartment, and unless he gives you a damn good excuse, consider him mistake #6: Sleeping with a D-Bag.