Edit: refining this a bit

On feminine folks I'd say thongs or nothing

On masculine folks I'd have to say jock strap or nothing.

NB I would say thong or nothing.

For me right now, nothing.

Nothing at all, and currently wearing boxer briefs.

It really depends. And it is awfully unfair. Women have lingerie. Guys... have underwear.

If the objective is to tease and just make things simmer for a very long time, give me lace, strong colours and as little fabric as humanly possible,just barely visible or noticeable under the clothing. Is it there? Is it not? Keep me guessing.

If it is to set the mood and go straight to the point, lets move towards full body web or mesh suits, with open crotch. Let's be obvious. Very obvious.

For guys, being one, I would like to have some choice but the most risqué underwear I own are jock straps. It's good for a laugh or a tease, but not much else.

I have seen this woman once mastrubate while wearing Pokemon panties. The geekiness was weirdly hot for me.

I'm wearing something dark-blue that is way too tight and thin for my liking. I don't like them actually.

Thongs for women. I'm in boxers at the moment

Long johns