If you’ve ever cried during sex, there’s a scientific reason for it.

According to Essence, you may be suffering from post-coital dysphoria (PCD). The mag recently spoke with New York-based sex therapist, Ian Kerner about the condition. He describes it as “[feelings of] sadness, anger, and distress generally post-sex and often post-orgasm.”

It might happen during a hook up, but PCD usually occurs when you’ve been intimate with someone who you are very close to.

But according to Kerner, you don’t even need a partner. PCD can happen even during periods of self pleasure.

While the condition isn’t well researched it is pretty common, especially for women.

” …sex and orgasm can release the hormone oxytocin, which facilitates attachment and connection,” he explained.

According to a 2015 survey published in Sexual Medicine46% of college women surveyed experienced PCD at least once in their lifetime, with five percent of participants reported feelings of sadness multiple times after sex.

While the study focused primarily on women, men can also be affected.

For those who experience PCD for unknown reasons, Kerner has a suggestion.

“It’s a good reason to see a therapist, who could help cultivate some self-insight,” he said.