Thanks, thanks a lot

Why do people think that pregnant women are fair game for any comment they feel like making? Why do they feel the need to comment on her size, how high/low she's carrying, or any other thing related to how she looks? Don't people realize that the last thing a pregnant woman needs is someone saying "boy, you got a lot bigger with this one than the last one, or is it just that I haven't seen you in a while?" Thanks for making me feel even more like a huge, beached whale than I already do.