The research is in: Diet Coke makes you skinny after all!
But not how you may think.
At one point in the not-too-distant past, some women used Coke products to flush out their vaginas after sex in an attempt to prevent pregnancy. As hard as this may be to believe, there was actually a paper published in the New England Journal of Medicine as recently as 1985 claiming that this technique actually worked (in fact, the author reported that Diet Coke was superior to regular Coca-Cola for this purpose)
So remember ladies, when you forgot to take your birth control, he didn’t wear a condom, and there’s no Lysol nearby—have some diet coke downstairs.