I think I have the cilantro soap thing, but overcame it by intense exposure and now I enjoy it _because_ of the odd soapy taste. Celery is fine/neutral to me. Wonder if there is something similar with truffles, because I feel they taste like burned plastic.

I can eat cilantro more easily than I can suffer celery, but cilantro is a really strong soap taste to me and I wouldn't readily do it. I bet you're right that conditioning could work since I don't suffer any allergic reactions, but I can't imagine wanting to get to that point!

I have a friend who feels the same way about truffles.