Rowing is a sport where you need to move a lot in a somewhat confined space, at least if you do it as a competitive sport. In order to row efficiently you need to move the sculls or oars fairly close to your body. read more
Personally, I never wear underwear under spandex. Sure it'll feel a little weird at first, but once you get used to it, you really don't feel awkward or ashamed. It just is much more comfortable. Even boxer briefs bunch up a bit! In the winter time, if it's cold enough I'll wear a pair of trou underneath my long spandex, but nothing more than that. read more