Preening - is this a subconcious thing girls do or do you do it deliberately sometimes?

1 example - today I was serving what i thought was a very attractive mum and she flicked her hair back both sides and adjusted her top. I saw all this out of the corner of my eye as I wasn't looking at her. I very rarely see this happen.

2 example - the other day my mate was serving this customer. I saw this girl glance at him and then she looked straight in the mirror to check herself out and make sure she looked good before he served her as she was in the queue.

So there are two examples obviously the second one is more obvious than the first.

So girls - what do you think? Subconcious? Deliberate? Or depends on the situation?
Preening - is this a subconcious thing girls do or do you do it deliberately sometimes?
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