There was this stand up comedian that had a funny little skit about tickling... I forget the comedians name but it was HILARIOUS!!!
He basically said something like this:
"When someone asks you if you are ticklish, it doesn't matter what you say, they are going to tickle you anyway..If you say yes, you're going to tickled to make you laugh.. if you say no, you're going to be tickled to find out if your lieing. If you don't want to be tickled the best thing to say is ' I have intense diarhhea and if you tickle me, it will come out"
hahahaha..something along those lines anyway. I probably just destroyed that joke but it was really hilarious when he said it.