Marie, I suspect we could discuss a lot about this since it is one of my main tickling fantasy, the one I actually enjoy the most :) If you are looking for a ticklee into it, you found me, feel free to DM / RP / add me as friend! :yayzorz:
It definitely is possible, when I am tickled under my armpits for example for very long times and extremely slow, while whispered on my ear very teasing things and seeing the barefeet of my female tickler, it makes me actually have an orgasm and cum. I had no idea it would have been so...