Kenshin,

It's not about how long you do it, but about how much fun the both of you have doing it. I've had mindblowing sex that lasted less than 10 minutes, and sex that went ho-hum after 30.

Each time is different, and until you get this performance/goal thing out of your head, it will never be good enough.

Performance anxiety has many faces.

__________________
Calm, quiet, smooth, devastating