After climax or reaching orgasm, the brain generally releases various hormones that make us feel comfortable such as dopamine, oxytocin (also known as the love hormone), prolactin, and vasopressin. This combination helps someone feel relaxed, reduces stress, and feels closer to each other.

Although this can happen to everyone, research shows that men tend to release more prolactin after orgasm. This hormone greatly promotes drowsiness. Men's bodies release about four times more prolactin during intimate relations with their partner. This indicates that sex with a partner provides comfort that makes men need sleep and rest afterwards.

If a man falls asleep immediately after having intercourse when the body is fighting against prolactin, women have the ability to have multiple orgasms and often can quickly 'rise' again. This is because women have a shorter recovery time. Women do not need rest and recovery like men do. This is why men tend to fall asleep while women still want to cuddle and feel closer emotionally.

By understanding the reasons why men tend to fall asleep after having sex, women may be able to better accept and avoid disappointment. Remember that this is a natural bodily reaction and not something intentional. Source: NYPost