I see a lot of people here commenting about "The Wall", but I'd like to know a bit more about this. What evidence of the wall have you seen first hand?

I'm still young, but I have a friend who is 26 and she moans constantly about how she can't "find a guy". Funny, since I've seen her taking a guy to her place every time our friends go on a night out. Not sure if this counts or not though.