I do little things to keep my body trim and lean... such as using the stairs at the office instead of the elevator, avoid fatty foods as much as I could, early morning jogs, and ride my bicycle on weekends.
I still remember the first time I went to an eat-all-you-can restaurant... I ate 5 full plates (average American-size dinner plate) of assorted viands, appetizers and desserts... and later discreetly went to the adjacent restaurant's restroom to puke half of it on the washing sink.
While I was in college, I once saw a group of guys in the Physics lab, conversing in a weird language I've never heard of. They sounded like dogs that are trying to imitate a duck quack.
Then my Physics II professor entered to borrow the scales, and saw my puzzled expression while looking at the guys... he told me they were conversing in Klingon.