I didn't know how to accurately phrase the question, but here's what I mean.
Some people get bothered by moist. I think it's the way the word sounds intertwined with some mental imagery that's conjured up when they think about it.
Cup and pop bother the shit out of me on a much more basic level. It's the way the words sound. I think it's the "hardness" of the "p" at the end. This is more of what I mean, but feel free to include any words that bug you.
I also hate when adults talk to babies or animals in that high-pitched "baby voice".