I'm 37 and I don't know how to do it (my secret is out!!!! snigger, it's true).
I've obviously messed around with it the odd bit. I think the reason I am so ill prepared is I've always preferred penetrative sex to oral and I also love kissing, so by the time the kissing is fully warmed up, it always seems to lead to sex.
I dunno, now I'm 37 it seems ridiculous that I don't really know the technique and I don't know how it feels differently for men if you spit or swallow or stop before they climax. I also had a hang up about it because I don't like the servile performance aspect....but I'm getting over that now and just seeing it as another sexual fun thing to potentially do.
All general info is welcome. (-: