I wonder if they even realize what they're saying? For example....
My husband took me out for dinner the other night. When we went to pay the bill, they waitress asked the first two questions (when's baby due? first baby?) She then said "Oh, I bet you hear a lot of horror stories" I said "Yes, I do, and I hate hearing them, I don't know why people have to tell me those kinds of things" She seemed to agree that it was inappropriate and a mean thing to do..... then she said "Yeah, when I was pregnant with my first my Mom told me this story about how she... blah blah blah" She actually started telling me the horror story!!!! Luckily for me, my husband is aware that I have been having this problem with people, and, the hero that he is, he stepped between the waitress and me and started asking her about the bill! He totally interrupted her, while blocking me from her view entirely! It was so rude but sooo funny! Thanks Jer! ;-)