For centuries, men have taken pleasure from the conviction that eating oysters would pump up their sex drive, and for centuries, that conviction was a good thing, for men, and for women, although not necessarily for oysters. Now the New York Times searches for evidence of truth to the rumor, and comes up with a study suggesting that certain amino acids found in mussels may, in fact, serve up some aphrodisia. But wait, we were talking about oysters, not mussels. In that case, the best the Times could come up with is a quote from Samantha Heller, a nutritionist at New York University Medical Center. "If you tell someone that something is an aphrodisiac," Heller said, "a lot of times they’ll get aroused just thinking about it." OK. Whatever works.
It has been scientifically proven that oysters, in fact, have no aphrodisiac properties at all.
As stated in the article, its all a placebo affect.