Originally Posted by satstrn
Am I more attractive because I have a woman with me?
Of course! For one, it shows that you are good enough to be with someone, you are not the lonely creep any more in their eyes, so they check you out. Also, the dating/relationship stuff is a competitive sport. The basic instinct behind this is to have the best available genetic material to yourself, and don't let others to have it.
Of course, these are just the basics, in the reality, it is much more fine, distilled, and there are probably a hundred more things to consider. But it is a well known fact, that you are more attractive when you are in a relationship.
I guess you are also a bit more confident, happier, and those are also attractive things.