What is it about Pillow Fights?

I've been hearing a lot about them lately - perhaps in spring, a young man's thoughts turn to watching girls jump up and down in pjs while giggling? Even in the NY article on the pending sale of Daily Candy:

The far-flung editors appear to see each other in person very rarely; I did not ask what happens when they do, but if I did, I’m sure the answer would have been pillow fights and much mutual hair-braiding.

Got infantilization of women on the brain? Get over it.

Unless it's for a good cause ...

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