...when you go home early and more-or-less sober on Friday nights, and your friends are finally getting used to your reason: "I've got a long ride tomorrow morning."

...when you spend the morning of your 25th wedding anniversary doing a short ride with your guy: 25 miles for 25 years.

...when your friend takes up cycling, and she barely has to buy any accessories--you give her the "extras" you've got lying around--extra gloves, extra seat bag, extra helmet, etc.