I was riding BART home the other day. It wasn't a particularly crowded day, but all the seats were taken. I was sitting near the doors, which I usually do, not sure why, I just always have. A women got on, who I thought was pregnant. Not super preggo, but had a little baby bump. I took out my head phones and said, "Hi, would you like to sit down?" As I stood up. She gave me a look and said, "No thanks." Yeah, pretty sure she was not pregnant. Oops. I felt like and ass.