Well, oh yes, I'm sure I'm not saying that's the only thing that controls people's food intake I mean clearly there are things  cultural  some cultures, the Japanese seem to love eating raw fish, I mean  how they can bring themselves  to do it I do now know, I mean the raw is  I don't think I'd want to eat again, but er erm not always if they were cooked either, but erm  the, the er and certainly if you look at the Australian Aborigines even though we take the Australian Aborigines as our kind of primeval people, they have astonishing food taboos, I mean their attitudes to food are very very culturally er effective to, to a quite extraordinary extent, some so that somebody  somebody discovered that eating a tabooed food by accident, they'll get very ill, a kind of psychosomatic illness.