"try it, you'll like it" absolutely positively never ever ever worked on me as a child. instead of succeeding to convince me to open myself up to new experiences, the imperative had the opposite effect. determined not to trust thoroughly untrustworthy adults, if anything, it bolstered my resistance. nope, uh-uh, not buying it. or tasting it, as the case was usually over food.
now on the other end of the i-know-better-than-you dichotomy, i personally happen to favor the indifferent shrug combined with the observation "you won't know if you like it until you try it" (works every time).
can you really accurately decide whether or not you care for a particular food without trying it first?
with clothes, how close do you have to get to conclude whether or not you like it?