One of the things I’ve always noticed since I was a little kid is that people never (ok rarely) smile on the subway. No matter what city I’ve been to, people on the subway are always frowning. In fact, I’ve been with friends who are happy and smiling and the minute they go underground, their mood changes.

Here in NYC, the trains are air-conditioned so why the frowns? Is it because you know you are heading to work for 10 hours? Or is it because you know you are headed home to deal with your bills and your four kids and their homework? Share your reasons for not smiling when you enter the subway in the comments. I just don’t get it!