Would you date a 400lbs person?

I went on a blind date with a guy last night, well it was supposed to be for platonic reasons, but he hinted he wanted more. Anyway we talked on the phone for a long time and i told him a lot about myself, mostly stuff you save for the 3 month of a relationship, yet he failed to tell me that he was grossly obese and extremely unattractive. He also smelled a bit. So i put myself on the line telling him about all my baggage yet he couldn't tell me he was obese? He described himself totally wrong and failed to mention for me to look for the fattest guy in the restaurant. On the other hand his personality was pretty cool. I mean what would you do?