I'm American and tend to agree. We stick out in other countries. Every gal in Paris looked hot, from ages 16 to 66. I think they just walk more and eat less. On the other hand, I felt that Europeans were very pushy in crowds.
Me, I'm about 10 lbs overweight, so not so bad. Try to stay low-key and appreciative of all things I see. But, after meeting some folks from Israel, (I was in France), I mentioned I was from the US, and the gal said, "well, obviously..."
So, not sure what that meant.