Three clinical psychiatrists had a paper in the Canadian Journal of Psychiatry entitled "Unusual Side Effects of Clomipramine Associated with Yawning," describing 4 patients who, while taking the the anti-depressant drug Clomipramine (brand name Anafranil) reported the unusual side effect of spontaneous orgasm every time they yawned.
The first case of this was a female patient who had been depressed for 3 months, but under treatment "Complete symptom remission occurred within 10 days". She then asked how long she would be allowed to go on using the drug, since she had observed that every time she yawned she had an orgasm, and she was able to experience orgasm by deliberate yawning.
Apparently it can work for guys too. One male patient said that while he found the repeated climaxes "awkward and embarrassing", he elected to continue the medication because of the therapeutic benefit he obtained. The awkwardness and embarrassment were overcome by continuously wearing a condom."
(yawn) ooooh. heh -heh. (yawn) woo-hoo. heh he heh. (yawn). what. (yawn) pontiac. Clomipramine - look what you've done!!!