Fashion Tips

I was on a train the other day, and as usual it was packed out and the corridor was full with people standing up. I was surrounded by two females on one side, and one on the other, all three about mid-twenties I reckon, the two not knowing the single one.
Anyway, near the end of the 25 minute journey, one of the two turned round to the other one, and just randomnly asked her "Excuuuuuse me, but where'd you get your outfit from?"
To which she told her.

Now, I can't see myself as ever doing that, but I don't know whether it's a gender thing, or just me.
Do all females do this?
Do males do this?
Am I just odd?

(Okay, let's not answer that last one)