In my opinion, you have to wait until the subject presents itself. Or during a makeout session, just tell her "Hey, I really like the way (insert body part) feels or looks, it's sexy. You don't have to come right out and say "I love fat women." The way you touch or squeeze her, and the little inuendos will be enough for her to get the point. Now if she directly asks you if you like big ladies, then let it fly 
12 years