I usally don't wear bow ties but a lot of men do, and some of them are gorgeous with them. Darren Criss wears them when he plays the role of Blaine Anderson in Glee. A bow tie is a type of necktie, it consists of a ribbon of fabric tied around the collar in a symetrical manner such that the two opposite ends form loops. It doesn't matter if you are old or young because everyone can wear it. The only advise I can give you is, to don't wear it if you are too young and fat or you'll look like Harry Potter's cousin Dudley Dursley... Remember to match the bow tie with the shirt that you are wearing !