Some of the WLs and MLs I've bumped into that live in the CBD almost always have a hat or a cap on when out and about. Makes it harder to see their beautiful faces!!
I have to admit, I do get a kick out of bumping into them on the streets and even more so if some sort of interaction occurs. I find the thought of "I've fucked this hottie before" quite electrifying and sometimes their reactions appear to be inline with this "fetish" of mine. Their shy / awkward demeanour makes me think they must be thinking the same thing.
Even more so when it's an actively working girl whom I can book very soon after such an incident. It's a real turn on for me when this happens.