I do write, but I am also a teacher and the idea of any parent punishing their child by tickling, no matter what age, is sick and a form of gross abuse. I don't mean playful tickling, which everyone can enjoy together, but the kind of tickling that is dominant, angry and invasive and that third parties can get off on. I have seen that sort of stuff elsewhere on the internet - mostly fictitious scenarios clearly formulated by a man but made to look as if it were a parent or even a child. All you need to do is look at the replies to see where the real intentions lie.
I should not ever like to be a party to such stuff. Any parent engaging in that kind of thing should be prosecuted and any adult getting off on it should consider exactly what it is he is encouraging.