How would you describe being tickled to someone who isn't ticklish?

[Hutlys94]

A friend of mine was asking what it felt like and why people find it torturous. I was unable to answer her because it's always been such a normal feeling for me that's been a part of me!

How would you describe 1) The feeling of being tickled, 2) Why it feels torturous when it continues and you can't stop it?

Thanks!

 

[tcklshstr8guy]

It’s kinda like getting good and stoned and going to a George Carlin show but more intense

 

[MrMacphisto]

The sensation itself is like a pleasant version of being itchy, until it gets to the point that you can't stop squirming reflexively.

 

[SugarSoaker]

When something should hurt, but you’re really stoned so instead it’s just really funny, mixed with a sneeze, but better