To the OP, I thought that was a clever comeback.

About fat people, I'm surprised how many people are overweight, especially kids, where I live. We have mountains 10 minutes away, the ocean 10 minutes away, the average temperature year round is 70F, it rains very little and it's almost never humid. You have your choice of hiking, backpacking, rock climbing, bicycling, mountain bicycling, surfing, kayaking, walking, running, team sports, sports with balls, dancing, kite boarding, sailing, wind surfing, paragliding, ocean swimming, just about anything that doesn't require snow...and you can do all of these year round (and you can ski in winter if you don't mind driving a bit). And yet people are getting fatter even here.

I think they're putting something in the food.