What do you think of girls who throw their bras at a concert?

We've all seen videos of girls throwing their bras at a stage for... who knows what reason, but they do this. Fortunately I haven't seen any panties being thrown xD
My ex told me she did this once, and seemed to look at it as something normal, but I lost a lot of attraction towards her when she told me this, I think it's immature and a lack of self-respect, like, the fuck? hahaha

So what do you think of girls who do this? Girls, have you done this? xD
What do you think of girls who throw their bras at a concert?
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