Gjentakelsens glede?

When we have an experience – hearing a particular sonata, making love with a particular person, watching the sun set from a particular window of a particular room – on successive occasions, we quickly begin to adapt to it, and the experience yields less pleasure each time. Psychologists call this habituation, economists call it declining marginal utility, and the rest of us call it marriage.

– Daniel Gilbert, Stumbling on Happiness