I have been into tickling since I was very young. I adore ticklish females. My experience has been that some hate it, some tolerate it, and a few love to be tickled. If I focus on the person and not just tickling, then she is much more receptive to being tickled. Of course the most ticklish usually means some sort of restraint to protect both the tickler and the one tickled and that opens up all sorts of other doors about bondage and dominance and submission that can really complicate things - or make them quite interesting!