Someone asked "What is something you always carry with you no matter where you go? Why?" on a forum. This was my favorite response:

"When my daughter was 3 or 4 years old, I took her to Chuck E Cheese.

When it was time for her to pick out a prize she asked me, 'What is that ring you wear on your finger?'

So I explained it was from Mommy and it was a promise that I'd always love her.

So she proceeded to pick out a plastic ring as her 'prize', then she handed it to me and said, 'Daddy, can you wear this ring as a promise that you'll always love me.'

So of course, I've never taken it off."