"Excessive tickling is abusive; it is a common tactic of bullies to torture by tackling and tickling. Tickling is also a proto-sexual activity that is very much in a gray area between OK and unacceptable."
Link: "Tickling" can be abusive [denverpost.com] via @denverpost
"I'm not ticklish," I told my daughter as a child. "Go tickle your dad." Claire was an adorable, little tickle machine.
That was big, fat lie. I am very ticklish. But I had a goal. When she tickled me, I kept a straight face. It worked. Claire jumped on her dad instead.
I'm extremely ticklish, and I don't enjoy it at all. It actually made a girlfriend of mine, years ago, mildly angry that I couldn't lie still while she ran her fingers down my sides under my arms. I know she was trying to be sensual and sexy, and I was mucking it up by squirming and jerking away whenever she made contact, but I couldn't help it.
i guess it depends on some things. im not against it, but theres a right time for everything. and it can be kinda like a joke, its only funny so many times in a row. also it depends on who is doing the tickling, my kids are cool, my close friends are good, my mate for the most part, but if random guy number 3 walks up and just starts going at it, im probably gonna deck him...