When he breaks the kiss, he says with his lips curling, "If you die again, you're coming back as someone even shorter next time. Penance for making me worry!"

That is the last he's going to let himself even think along those lines. He can't allow himself to go any further or he would spiral into the dark regions of his heart that had been broken so severely they never would healed. Humor, as he's learned from the very man underneath him, sometimes did have some practical uses, like springing back from the brink.

Wuxian's hands were of course going to get him the rest of the way there.