I'm not. I've always wondered, compared to other allergies (if you can call it that), why do some people that are lactose intolerant still like to sometimes eat/drink things that they can't even though it will make them suffer a little bit later?
Is it just a case of not wanting to miss out on some good food?
I am lactose intolerant, but I didn't get that way until later in life. I'm not sure how, or why - maybe it was another illness that triggered the intolerance, but you can become allergic to anything at any time.
Maybe people have gotten used to eating / drinking certain things and just don't want to stop.