Depends on spot, how their tickling, and is there anything between me and her finger nails.
Barriers make it go longer. Nails with no barrier make me burn out quicker. Tongue has a longer span than nails. Socks make my feet go longer.
I've fried in as little as 15 minutes on the feet. And I've gone a couple hours and the tickler got too tired to keep it up...lol
Christopher