I think it is very much a matter of the kind of people you are staying with. However, you may feel that people are staring at you more over here - but that could well be just because you are a foreigner. Don't assume that because someone is doing that this means they think you are overweight. Just accept that you are going to stand out in this society anyway and that this means that you will attract attention. I am a tall white guy, so I stand out and probably get more than my fair share of looks compared with if I was shorter and ethnically Asian.