Along the lines of what Ryan said...
...there is a similar technique you can try during actual intercourse. Thrust until you near climax, and then stop. Repeat. If you can do this, you will last until she throws you onto the floor.
"Purgatory's kind of like the in-betweeny one. You weren't really shit, but you weren't all that great either. Like Tottenham."
I'll try being nicer...if you'll try being smarter.