Sex might be a problem for folks hanging out in outer space, but it can also be difficult for women with female orgasmic disorder i.e. the female equivalent of erectile dysfunction. There hasn't been much in the way of a female Viagra, but tests on a possible sex-drive drug for women have begun in Australia and Canada.
Going into space is pretty fraught with peril, and the men and women who do so are incredibly brave. In addition to the whole not-being-on-freaking-Earth-anymore thing, there's also the ubiquitous motion sickness. So NASA has set its eyes on developing a nasal spray that could combat motion sickness.