Ted puts his hands on the arms of the armchair to support himself, just enjoying the kiss and how happy Joan is. It makes him feel so fulfilled, to make her feel such joy.

In the end it's his leg and back that ends up cutting the kiss short, not the food. "Ooh, ah," he exclaims softly, straightening up and rubbing at the back of his leg. "No, I know, I know," he says before Joan can say anything about it.