I think he might be referencing the overall day-to-day diet. I do understand that, acquiring a taste for something. After while those other strange tastes in the diet don't seem so strange, may even be pleasant.I understand all of that. Can't remember if they had anything on hand to cleanse the palate. I've done taste testing there they provided the crackers and water between each sample.
FWIW, I have unusual tastes and preferences as it is. They could give all the saltines they wanted between samples, and some of those beverages were still going to taste funky to me.
Some of those pops I had in SE Asia reminded me of my childhood chem set. Had no desire to acquire that taste.