Jack probably didn't kiss Sammy just once, we just SAW it once.

The funniest about it infact was that Sammy started to like the kiss more and more they got into it, and Hammy stood nearby and thought "what the hell" ... epic scene.
The "back swing" scream was one of the best moments, along with the kiss of course and also the "wacko" shout and that hilarious mustard-ketchup face on the plate. But it got all beaten - in my taste - by Teal'cs emotional outburst and kicking that poor soldier back to the door he came from.
All in all, one of my absolute favorites of the entire show.
