10,000 hour rule? If you had sex for an hour a day, every day, for 13 years, you’d be less than half way to your “target” if that’s the right word. You decide. Or read this: https://scholar.google.com/scholar?hl=en&as_sdt=0%2C5&q=10000+hours+psychological+science&btnG=#d=gs_qabs&u=%23p%3DpZyl8K6obXwJ
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