During high school, he got a doctor's note to excuse him from physical education.

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Your doctor will conduct a physical exam during which he or she will note whether your sexual development, such as your pubic hair, muscle mass and size of your testes, is consistent with your age.

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Please note that the above is a rather vast oversimplification of the physical, neurological and biochemical considerations that have to be made.

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In an overnight research note before gold hit its session highs, UBS suggested gold may not have hit its low yet since physical demand had not picked up significantly during the recent pullback.

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