stewey, you are probably right in a lot of cases, self diagnosis, drama, etc - but equally many people do have intolerances - we put so much unnatural junk in our bodies these days we can't really be surprised if our bodies don't like it.
intolerances can often only have very mild, sometimes barely noticable, symptoms, such as bloating, mild itchyness, dizzyness, diarrhoea, nausea, and people will just ignore it because its ''just one of those things'' and is ''normal''.