Bustle goes on to list symptoms of PCD as consisting of "anxiety, agitation, aggression, tearfulness, and a sense of melancholy or depression following sexual intercourse." So, why does this keep happening to women?
Fear not, it's not from a weak penis game, but rather just the body's natural chemicals reacting badly. Researchers from the Queensland Institute of Technology theorize the sadness to source from "hormonal shifts which occur after orgasm, which can also trigger post-coital headaches."
The conclusion from the survey says what many, many women are probably thinking when serious depression follows a sexual encounter: this is a problem that's under-recognized and under-researched. Just remember, guys: it's not your fault.