Probably the most true and enlightening post I've read in a while! But we, as men; seldom realise this and get locked into our fantasy worlds.
Proud of you dude. My ex taught me this, most of the time if a woman is staring at you, shes trying to get an ego boost or shes trying to make some other dude jealous haha. Or both!
It's pretty simple really. We all like to be liked and we love to be desired. It's human nature. We all also love variety. A change is as good as a holiday. I really don't see anything other than normal human actions/emotions. We all flirt and we all love being flirted with. Anyone who tells you different is full of it. However, I must be wired differently than most. I've lived on the other side of the planet from my wife, before we were married, surrounded by drunk, horny girls who LITERALLY beg you to take them back to your place and fuck them. But I never did. No matter how drunk/stoned/horny/lonely I am I have never ever cheated on anyone I've been in a relationship with. And believe me when I say I've had ample opportunity to do it. There's nothing wrong with desiring someone else or being desired by someone else. What matters is the action you take.