Pleasure - the law of diminishing returns

First time - Nice
Second time - Getting not so nice
Third time - Neither nice nor unpleasant
Fourth time - Getting quite tedious
Fifth time - Unbearable, time for something new

This refers to a particular set of pleasures - generally things we experience through the senses. We might like to explore pleasures that do not get tiresome the more we experience them. Are there any?

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