His/Her Perfomance during sex?

I think about my performance. Getting a girl off gets me excited so I tend to think about that.

I'm thinking about my performance because I'm trying to make sure that she's enjoying it too.
Try & put in a "poll" survey next time. I'd like to see the results.

trying to go with don't worry about either and just enjoy each other

I typically watch my partner for signs that she is liking something such as her body movements or moaning, etc. I will also ask her how she likes certain things that I might be doing to get verbal confirmation. We have worked long and hard to improve the communication aspect in that way. So, I would say yes I worry about performance, but not for a selfish egotistical reason. I'm really looking to see that my partner is being satisfied.

Depends who is on top!