I'm not surprised. I can't count the number of times overweight females have tried getting me interested in them. I think it is an evolutionary thing. They are not that fit so they look at (unconsciously) healthier males as being able to provide better genes for much healthier kids than they would have with another overweight person.
Once, I remember eating my burger in peace until suddenly I notice an unbelievably unattractive short statured female standing maybe two feet away from me, staring at me and licking her icecream concurrently. The way she was staring at me made me think she wanted to lick me more than her icecream! I mean, just imagine someone licking their icecream while staring at you. How horrible must that be. Obviously, I got very uncomfortable and looked away and finished my burger, completely ignoring her.
Another incident at a Subway: while I'm giving my order, this BIG (I mean Melissa McCarthy big, before she went on a diet) woman comes and stands beside me, waiting for me to finish my order so she can give her order (there was only one guy there). So while the guy is waiting for me to pay him and I'm getting my wallet out), she starts giving her order and it is the EXACT same order as I gave (down to the condiments/sauces!). I think that was supposed to get me to say, "Oh wow! You like what I like!". I didn't say anything and left bewildered.