Yes, men can wear hosiery [i.e. pantyhose; tights]. Men do it often. In many countries, women suggest the idea to their men, and the men are happy to comply. Even if it is not hot or cold, you might want to wear a pair, to keep your pants clean, so that you would not have to dry clean as often. There are many other reasons to wear hosiery. Feel free to ask people for reasons, if you need more.