I am partial to thongs, g-strings or Brazilian cut undies or boy shorts when I wear them, but I do not wear them all the time. It depends on what I am wearing as to whether or not I wear undies. Of course I wear them when wearing skirts, but outside of that it depends on the material of what I am wearing for the most part. On men, I prefer nothing of course, but if they wear them boxer briefs or boxers are good. I think men look silly in tight shorts or thongs and am giggling too much when I see that to think it sexy.