I love the build up of intensity.
It's not really very linear, I build up tension and then the boys open their mouths and get into these stupid contests, and they start talking and talking, so it's a bit of a wavy curve...
*wags threatening finger at Spike and Xander*
Alas, they have a will of their own.

As for control, Spike is now trying to knock Xander off balance. Heee.