Many older people don't, Atheist. They seem to think we're jumping on some sort of attention seeking bandwagon.
I ate peanuts many times a week. I loved them. I was almost 40 when, at a NYE party, I ate peanuts and for some unknown reason the allergy started in a strange way.
When a reaction to peanuts as the cause of my problems was suggested I did a stupid thing. Ate none for about a month then bought a bag to experiment. That was when the anaphylaxis hit.
I would love a bag of peanuts now! I think that an allergy can go as quickly and strangely as it came....but I'm not brave enough to try it. :-)