What clothing on a man is sexy?

Yes, heterosexual, too, however I appreciate the male beauty more than the female beauty and can tell what looks good on men aswell as what looks good as women.

Suits, if they are a properly fitted one, shapes the person well, can make men with a bit of belly look a bit thinner, it broadens the shoulders, shapes the sides. Personally, I like them when they do not have the buttoned up shirt underneath (a shirt, but with a few buttons undone, and no tie, but that is what I think looks good, others like suits full on, I do, but not as much as the way I explained.