New Experience...Help!

Okay ladies, this one is a little different. I've been sleeping with this guy and the sex is amazing, but I've kinda run into something I haven't dealt with before... I take pride in how quickly I can get my partner off and the more turned on he is the more turned on I get, but the thing is... this guy freaking lasts forever! The other day he stayed hard for at least 3 hours straight. Basically, I'm wondering if anyone else has experience with this and any tricks or techniques to get him off faster?