Is there a reason for authors to use their real life names?

Nice question! I guess some people just don't like the idea of hiding behind a pen-name. It's possible, but there could be many other reasons. I mean, especially because what if they want the recognition, but don't expect the fame? Like, me personally, I would love to be published at least once in my lifetime and I'm hardly expecting fame, but I would just love seeing a book with my name on it on my bookshelf... so I'd use my real name for that purpose. Who knows?