Dr. Lori Beth Bisbey is talking about PCD, post-coital dysphoria, also known as post-sex blues, where many people experience feelings of irritability, sadness, or anxiety after consensual sex.

The Accredited Advanced GSRD (gender, sex, relationship diversity) therapist, registered psychologist and sex, intimacy & relationship coach says that while there are many theories and contributing factors as to why this phenomenon occurs in both men and women, “there hasn’t been much research yet, so causes are speculative.”

Bisbey notes that “a history of sexual abuse and/or sexual trauma could pre-dispose individuals to PCD, as the traumatic experience could be triggered by some aspect of the consensual sex.

Anxiety can be related. Also, sometimes people have sex that they believe they want, and then realise afterwards that it wasn’t the best idea. Concerns about whether their performance was good enough and if their partner was really satisfied can also have an impact.”

She also theorizes that “shame around sex can lead to PCD, and anxiety about performance before sex is something to watch for, and PCD can also lead to sex avoidance, which can have a negative impact on a relationship as the partner may fear that sex is being avoided because the person is not attracted to them any longer.

“This can lead to performance anxiety and erectile dysfunction as a result, which can sometimes start a negative cycle with a partner – so it is best to deal with this quickly. Speak to your doctor about it to make sure that there are no physical health issues, and consider speaking to a therapist who can help deal with any underlying psychological causes.”

• Be sure and follow Dr. Bisby on Twitter at @drbisbey.