I can't speak for others, but unfortunately I don't have a cadre of friends who I can go to with "my GF and I keep having problems with my cock hitting her too deeply inside," which was the first question I posed in here. I got a great answer from one of the female members BTW. There have been lots of other good tips that I've gotten along the way as well. My daily (male) friends either wouldn't believe that one can sometimes have problems with a dick much larger than most, or don't have any real advice to give. Here, at least there are a good number of members who understand that living with a large cock changes things, at times, in unexpected ways--physically and psychologically. Getting and sharing advice has been really helpful at times.
I'm not into doing the "my thing is bigger than yours is." Cockwise, I was a (somewhat) late (but very big) bloomer and have experienced both sides of that game, and pretty much gave up playing that game in high school. I realize that some guys are, and if that works for them, fine. It's just not my cup of tea though.
There is one other advantage to this site: porn. I just don't find it very arousing unless the guy's cock is near my size. I'm sure it has to do with identification with the scene on the screen. This place is usually pretty good at providing decent big cock porn links when I'm into a mastubatory mood.