I don't even think most women should wear them I don't like them at all. On ladies I think that boy shorts are far more sexier, just a little peak of a butt cheek rather than the whole shubang! As for guys well, straight, gay, cannot make up their minds - thongs are just rotten IMO.
All the time? No. that's a little weird. No one likes wearing thongs that much.
But on occasion.it's a nice little surprise! I actually bought my ex a man-thong as a joke when we were together, but made him model it for me and wouldn't you know it---It was a total turn on! For both of us! Ha ha :-)
Are you referring to under your clothes or in the bedroom? Lol. I think if a guy is comfortable enough with his sexuality to wear a thong then go for it! I'd probably laugh if my boyfriend wore thongs and it would proably creep me out a little bit. I mean, I though I was the one who was suppose to wear those?
I'm not your girlfriend so I'm not going to tell you what to do, but it doesn't work for me at all. Honestly it would just make me think of when I've gone to the gay pride parade. Which is fine, but I assume not what you are going for as a straight male.