Sometimes Little Kid's Jokes Make me Think

I had a friend who was incredibly ticklish. so much so that if you just pointed at him it would make him  giggle. He explained that even the displacement of atoms was enough to send him into volleys of laughter.  I admired his ability to make a silly response seem somewhat less foolish by applying a thin veneer of science to it...

I saw this joke on someones wall and at first I was like "huh? but then when I said it out loud it made me smile... 

How many tickles does it take to tickle a squid? 

TenTickles.