I'm sure you get the idea. Usually, it's some skank who you could care less about, but you have to distract so you can talk to her friend. This feeds into my long-standing theory that attractive people seek out ugly friends, to make themselves feel even more attractive. This is how the attractive folks then become the leaders of these little groups. Selfless beings, wingmen are generally just happy to be there for you.
Some wingmen even find joy in playing decoy.
Guys and gals, we've all been there. You spot the one you want across the crowded room. Then, out of fear, shyness, or sheer cowardice, you can't bring yourself to walk up to the object of your affection alone. So, you walk over with your winger. Hell, sometimes I've been known to take a whole squadron.