I confess I love sex - the whole game of seducing and being seduced just drives me wild. I really enjoy satisfying my B/F. I like pushing him to the limit! Problem is - it doesn't take much. I've never told him exactly how I've felt (could never do that to him). So I guess my question is: how can I 'teach' him to hold on.
Don't get me wrong! He's great in bed. 
I just love teasing, pushing and being pushed to the limit (even beyond).
I just wish he wouldn't cum so fast! 
Well, my guy usually can't last very long if I am teasing and playing with him quite a bit, but the comment about giving him blow job about an hour earlier works wonders for us. If he isn't too tired that is. Also we have found that he lasts a lot longer if I am on top. He said for some reason if he is the one in motion, he will last longer.
as a somewhat older guy 30, I have learned as has my wife to simply stop! if you know he's about to go overboard, stop for a few minutes, tell him in a whisper that you want o make it last longer because you're really enjoying him, it works for me.
the muscle used to stop a guy pissing midway can be flexed and it stops him cumming. try giving him a blowjob an hour earlier..he'll last for ages after heheh.
If he gets off that quickly, he has more available. As a younger woman with younger men I almost always jacked them off during foreplay. Slows them down and adds interest.