Since this is kinda popular so I tried to see of how it goes through...

Mechanics...
tickle the user above you somewhere on thier body that you think is ticklish.... Please avoid mentioning vulgar or malicious posts... Thanx

So i have nobody above me so.... awww
( secretly wears a tickle resistant clothes... haha! )

Nuu! Unfair!
Me tickle you in teh side

Foot! Foot! Always the foot! Haha!

Tickles your hair

Tickles you behind the ear...

Tickles you with a feather

tickle in teh nose. Haha!
Hachoo?

Tickles you in the side.

Tickles your eyes