All I can think is, "you are only interested because I look like a nice piece of ass."
And why are you going out with her, exactly? Could it be you're attracted? Isn't that what starts the process? Attraction.
Think about this.. would you have dated a fat woman back then? Would you now? Depending on your answer, you aren't all that different from them, after all. It IS ok to have preferences... at worst the women you described were snotty, gossiping cows... but not rally all that shallow.
I'm not saying you should forgive those women, but you shouldn't make other women pay for their actions.