I dabble with darker side of tickling a little bit, when my inner tickler is feeling in a bit darker mood, I myself like a good tickling interrogation, it's always fun in being the one, trying to get the person to crack, over whelming them slowly, despite them wanting to desperately hold out, they eventually (hopefully not to quickly) crack and tell you what you want to know! its an oldy for sure, but I would still rank it up there high on my fantasy list if I am feeling in that more merciless mood.