Comic strip. Calvin (a 6 year old boy) is talking through a mouth very full of gum: I need to get a heart rate monitor. Hobbes (a tall thin anthropomorphised tiger): What for? Calvin: To make sure I'm chewing at my aerobic threshold! Every day I want to see that I'm chewing more gum faster, harder, and longer! Hobbes: What's the point of attaching a number to everything you do? Calvin: If your numbers go up, it means you're having more fun. Hobbes (looking into the distance): Science to the spirit's rescue once again.
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