[NSFW] Guys, what are the best uses for each type of underwear?

I’d like you to consider boxers, boxer briefs, classic briefs, bikini briefs, g-string/thong and jock straps. I’m really interested in how these affect physical activities (especially bicycle riding without bike shorts) and keeping dry (to reduce inviting habitat for fungus).

I figure I want briefs for riding because it holds my balls in place, but they also trap moisture. Unfortunately, changing is not necessarily and option. When I don’t ride, I’m wondering if boxers air things out, or do they also allow moisture to build up, since there is no fabric to carry it away.

Or what about a jock strap with boxers?

As for the rest of the models, I’m pretty sure they have mostly to do with sexiness. Although I’m a little confused by boxer briefs. Is that just about sexiness or does that also have a practical component?