Why do girls on TikTok make videos of themselves bouncing their boobs?

Recently I posted, asking if Women liked it when guys looked at their cleavage. I get answers like, looking is ok but staring isn't. One thing I have noticed is there are a lot of women who go on places like TikTok, wearing nothing but a bra, and bounce their boobs for views. I wonder if the same women would feel that uncomfortable having me stare at their cleavage in public?

I post about this because I think there is something weird about this behavior.

Why do girls on TikTok make videos of themselves bouncing their boobs?
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