Men's undergarments are fairly simple, just like them. The guys usually wear briefs or undershorts. Briefs are usually plain white with some occasional solid colors thrown in for interest. The male undershorts tend to be a bit more sophisticated, consisting of madras plaid, or pin stripes or even polka dots. Most guys either wear a white undershirt or no undershirt at all.
Women's, unmentionables are much more interesting, especially to men. The bottoms come in various cuts such as high rise, french bikini, low rise, no rise, and thongs. They also come in all sorts of colors such as soft pink, hot pink, bright pink, and neon pink...and that's just one color. Of course, there are tops to match.
As a female, I consider myself lucky to be able to have such a wide variety of underwear choices, as long as it's comfy. Those thong things would never work for me.
Mosey on over to Jenny's and take a peak at other interesting "U" posts.