That very small girl is obviously not a threat to the men she was touching. A man doing the same thing to a woman does in fact represent a potential threat. That's the difference that gender makes - men are generally larger and stronger and if they start tickling a strange woman, she is going to feel out of control and threatened because she doesn't have the physical ability to assert her control over her own body.
That girl's only option, if some guy started tickling her, would be to verbally object and hope they stop. But those guys could have stopped her any time they wanted to.
I literally cannot believe I just had to explain something that obvious.
And I also resent the attempt to stealth your gender politics onto the forum. I almost deleted this, but I decided that my comment might be useful to other people who are just completely missing the point.
I am closing this thread now because I don't intend to circle around this same point a hundred times.