In 1954, researchers Peter Milner and James Olds discovered the pleasure center of the brain.

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Today, with much more equality between the genders, the business aspect of marriage is largely gone and love and children are the center (I am certain much to the pleasure of Ms. Austin).

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Imaging technology has confirmed that this kind of play activates the pleasure center in the baby's brain, whereas engaging in a mismatched activity doesn't.

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Even when given the option to eat when hungry or to stimulate the pleasure center, the rats chose the stimulation until they were physically exhausted and on the brink of death.

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