As therapists, we may never have heard of sexomnia, postcoital dysphoria or persistent genital arousal disorder – and chances are that clients struggling with these more unusual sexual issues won’t have heard of them either. In the penultimate part of her blog series on sex and therapy, psychosexual therapist, supervisor and author Cate Campbell introduces some less common sexual presentations – including how to recognise them, when to reassure, and where to refer on.