I remember being in a public place one time with my sister who is MUCH fatter than me, and I was talking about being a hundred pounds overweight. She was horrified and wanted me to keep my voice down.

I told her "Well come on, Rose it isn't like they can't tell just by looking at us".

She's much taller and heavier than me, so maybe she was afraid if people knew I was a hundred over they would figure out that she was even more than that. I'm not sure what her reasoning was, but I know I felt more comfortable with it than she did.