For all you people wondering why the heck Ratbert is in Dilbert's bed, THINK about it.
1. Ratbert is like a little kid.
2. Dilbert, being a grown man, is like Ratbert's father.
3. Ratbert is afriad.
4. Dads are a source of security for scared children.
5. Therefore, Ratbert is seeking protection from the Nose Fairy.