When females get mad at what's her own fault what going on?

I've seen girls who are always pulling up there pants from the sides,, that she seems to act as if they are falling down, and wiggling there booty all over the place, over and over, as if they keep falling down she she has to pull them up again. The funny thing is she's standing in one place, odd.. Then get pissed if a guy looks at her wiggling all over the place. Do some girls do this purpose? Is it a sexual thing? It seems as if females want you to look. Odd..
When females get mad at what's her own fault what going on?
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