There are many different variations on this ad, but all of them show an expanding belly and a much more attractive woman with a slender belly.
The reason this one gets to me more than most is that when I was a young girl, my father constantly told me to hold in my stomach. He apparently thought my mother's stomach was not thin enough (after giving birth to 3 children) so he told me to hold it in or I would end up looking like her. That made me do 200+ sit-ups a night when I was in high school. I kept an obsessive record of the number of sit-ups by my bed each night to make sure I wasn't starting to look like her. At the time I was 5'6" and weighed 98 lbs. I wasn't anorexic, I don't think. I think I was just naturally thin, but I did have a little pooch I was very, very ashamed of. It was the hugest part of me and absolutely awful, something to be gotten rid of no matter what. It didn't help that my siblings were rail thin and called me "fatty fatty, 2 by four, can't get through the bathroom door!" I took it on and was ashamed of my body and how "fat" I was for years. The more accurate truth of it is that I have always been slender, if not thin.