Q: I'm having a hard time keeping up with my new girlfriend in bed. What can I do?
A: You're a little freaked out that this may be a big deal, but there's always a solution to gaining some energy. Switching tempos in bed will even out each of your respective energy levels and get you moving at the same pace. You can slow things down or even lower the intensity by putting her on top, or having extended oral (in either direction) so you can catch your breath. You don't want to be winded.
The more you switch things up in bed, the longer you'll last. No new girlfriend wants a quickie.