Pretty sure this was my first thong.  Was talking to a female friend about how guys didn’t have to wear thongs or something and the problems that come with wearing one (going up the ass crack,  etc.).  So wanting to see if any of it was true, I got a pair.  Ironically, the first time I wore them was on  shopping trip for underwear for another female friend.  The up-the-crack feeling doesn’t bother me too much.  I usually wear them with dress pants so I don’t have to worry about it crawling up or bunching up like with boxers briefs.