Well, performance issues are common among first-timers, second-timers and so on. If he's not a porn star, he probably can't perform on command. There are other ways he could have been pleasing his partner for the night, besides intercourse. We don't do chemicals, so I can't really say that it would be good or bad. I think Mr. LFM might have a beer before we go somewhere, but that's the extent of it.
If he was jealous that you were having fun while he was having performance issues, I still believe that there are other ways for him to please a woman. Nervousness certainly has a lot to do with performance. Mr. LFM and probably most of the men on this board knows this all too well. Relaxing and enjoying the company before-hand seems to work for us. Like Mr. Truelove says, it does get better.