Liquid Space Suit: Sure the BioSuit design merges practicality with everyone's love for skinny jeans, but perhaps you're looking for something a little skimpier? Why not just paint the space suit directly onto your skin? This may sound like a page from someone's teenage sci-fi fantasies (or at least a "Futurama" gag), but it's actually an advanced possibility laid out in MIT's Extra-Vehicular Activity (EVA) Research program.
Imagine yourself standing, nearly naked, as scientists spray you down with layers of tiny charged polymer fibers. Next, they might smear on a layer of smart gel that, when treated with an electric field, expanded to apply even more counter pressure. Accessorize with a wearable computer and pressurized helmet, and you're ready to space walk in your underwear. Astronautix has a good overview of the project here.
2Suit: This is a great example of a spacewear design that, if not fashionably sexy, is at least practicably sexy. Yes, I've blogged about it before, but how can I not mention space suits designed to enable zero-gravity intercourse? Designed by former "Bastmaster" star and space enthusiast Vanna Bonta, this isn't so much a space suit as it is leisure wear for intimate moments aboard a space station. Each nondescript-looking jumpsuit unsnaps in the front, according to Wired. Then, two such suits can be snapped together to form, in it's creator's words, "a large bag" which can be strapped to the wall while the inhabitants engage awkwardly get it on.