Oysters, ditto. Used to like them: once opened four dozen for an office do, ate about a dozen in the process and then my share of the ones on the table once we started drinking. Then in Stuttgart I was stupid enough to eat a dozen at Nordsee and spent the night going whoop-de-doo in the cludge. Then a week later, saying "nah, that was a fluke", I went back to Nordsee and spent another night staring into the porcelain. No never no more.
BTW, the oysters in Portugal were stupendous. Dunno what they're like these days, but when I was there in 1979 they were too big to swallow at one go, you had to bite them in half.
Quinoa. Boredom on a plate.