Constantly being on the verge of an orgasm sounds like it might be fun, but it's actually an awful medical condition known as Persistent Sexual Arousal Syndrome (PSAS). Sufferers of PSAS — who are always female — say that unwanted genital arousal makes it virtually impossible for them to concentrate on anything, even sleep. Identified only six years ago, very little is known about PSAS, including why it happens or how to cure it, leaving sufferers to come up with creative home remedies. (One woman freezes a water-filled condom to numb her entire area!) This past Friday, 20/20 aired a segment all about the medical anomaly, placing its four subjects on a really bizarre — and perhaps totally inappropriate — Skinemax-esque set, with special lighting, and glasses of wine. Clip above.

Earlier: Horny? Sure Hope It's Not "Persistent Sexual Arousal Syndrome!"