Ok, it seems that you are not quite familiar with prada sunglasses .So, as a matter of fact, it is one of the most expensive brands in the world, which produces a lot of goods, ranging from clothes to accessories, you could of course find some sunglasses for men at their website or in some large shopping centers. Of course they produce sunglasses for men. Just try to visit their website for furhter information.
Prada mainly produce fashion stuff for girls and women, but it doesn't mean they design nothing for men. They launch glasses for men each year.
One of my male friends is a huge fun of prada glasses. His sunglasses and normal glasses are all bought from prada. I feel thats cool and clam, and they hold a sense of noble. Prada plays safe card, so you'd never be out of style.