A friend shared with me an observation that I thought was provocative enough to get you all riled up. He says that when men tell a story about how their day went, it's usually focused on something good that happened. When women tell a story about their day, it's usually focused on something negative. BOCTAOEThat last acronym is Dilbert's own shorthand for But Of Course There Are Obvious Exceptions. It allows him to make sweeping generalizations.
Update: Dilbert has now revised his theory to say that complainers mate with non-complainers. Don't take his blog too seriously.