Which of the bodily 'functions' of the day gives you the biggest thrill?

I have heard that a sneeze can be as rewarding as an -- I wouldn't know; can't remember the last time I had a cold. Now you hae your urination which can be pretty gratifying. Then there is the other daily emission, which I'll rate as number 2. Some like their burps and some like their yawns most. What is your favourite bodily function? Exclude the obvious! There are kids in the room -- me (mentally)!