Girls should be allowed to show off as much as they want whenever/wherever they want

I agree that people in general should be allowed to do what they want (as long ss it doesn't hurt others or impinge on their freedom). That doesnt mean that being allowed will make it safe to act on all your impulses. I think you need to be wary of where, and around whom, you flaunt yourself. The repercussions may be more than the bit of fun is worth.