What are we teaching our girls?

I was trying on clothes at Target the other day just minding my own business when I overheard 2 mothers with there daughters trying on swim suits. I heard the mother say to her daughter "That bikini looks good but you really need to start doing some sit ups." The daughter responded with "Oh, Ok." I came out of the dressing room to swap out some clothes and saw the girls. These girls were about 12 or 13 yrs old. Before I left they were still trying clothes on and this time when the girl showed the different bikini to her friend she had her arm covering her stomach and said "I need to work on my fat stomach" I did everything to control myself from slapping that little girls mother. These were thin girls. She didn't have a 6-pack but she was so far from even being chubby. That one comment from her mother and I already saw the complex forming. She was now trying to cover her stomach. I just think its ridiculous. It was very upsetting to me. Yes people should be healthy but come on! Just had to vent about that!