I'm actually not ticklish. I have no idea why, but you can tickle my sides or my feet til you turn blue and I won't laugh.
On the other hand, babies *can* tickle themselves because nobody has told them yet that they *can't* tickle themselves.....thus they CAN tickle themselves. Just think what mankind could accomplish if we never learned what we COULDN'T do.
I guess I have developed a "thick skin" because I used to be ticklish, but not no more. Misa can try to tickle me on the ribs and bottoms of my feet....nothin.
I never lost being ticklish from childhood. 20 years ago, when I started to have varicose veins & I didn't know what they were, I saw a doctor.
When he touched my leg, I almost hit the ceiling. Scared the hell out of him.
When I was younger and living at home with my sisters, we would have a tickling bash where we would spontaneously tickle each other. The uproar and hilarity was priceless!