You and your partner have just undergone a major nookie session. It was good for everyone,  and after you both reach orgasm, there's nothing you want to do more than cry, right? It sounds completely bizarre, but many people find themselves in tears after having sex. And guess what? It's totally normal and not all that bizarre when you look at the rationale behind it. The reasons for letting loose the waterworks may not even be emotional – they could be chemical. When an orgasm happens, it releases a flood of oxytocin, a hormone that can make you emotional, particularly if you're a woman. If you find that you're overly sensitive and cry at the drop of a hat outside the bedroom, then you may be more likely to cry after orgasm. Oxytocin is also behind the urge to cuddle and feel close to your partner after sex.