For example, some people who are survivors of sexual abuse might experience postcoital dysphoria, because even a good experience with sex can be triggering, according to the study. Schweitzer says it's possible that there's a genetic component to PCD too—the researchers noticed a similarity between twins battling the post-sex blues if one twin experienced it, the other was likely to as well. Another theory about postcoital dysphoria is that, during sex, the bond is so strong that, once it's over, it can make you feel sad, according to the International Society for Sexual Medicine. If you are also orgasming during sex , then there can be an emotional release in addition to a physical one, she says. Advertisement While we know that crying after sex is definitely a thing, there isn't good research to explain why some people do it and some don't, says Rachel Needle , PsyD, a licensed psychologist and certified sex therapist in West Palm Beach, FL. Listen to the advice of these super-confident ladies to banish any lurking self-esteem issues. While the emotional reaction itself can be jarring for you and your partner , crying after sex is actually pretty common. For people with a rock solid sense of who they are and what they want both in the bedroom and in life , the authors of the study think PCD is less likely. If you think that's the case, you might want to think about what kind of emotions you tend to experience after sex, and explore why that may be, Dr. A not-so-shocking study found that the causes are multifactorial, but suggested that psychological factors are the biggest contributors. Technically, post-coital dysphoria can include any feelings of melancholy or depression, anxiety, agitation, or aggression after sex — but it's usually characterized by tearfulness.