I have always had this idea and wonder what women might think of it?

I've always wanted to find a girl with a beautiful face, but who is over weight, then I would date her and encourage her to lose weight and get fit, and watch her get more and more beautiful. I would be encouraging and supportive and exercise with her etc. But do you think this whole idea is insensitive, rude, mean, manipulative, or could it be a good idea?
I have always had this idea and wonder what women might think of it?
Post Opinion