You know you are a cup convert when...

... you find yourself almost looking forward to your next period.

... when having a friend over, she comes to say to you, "Maria, I hope it's okay I took one of your pads, I didn't bring enough", and you rejoice because that'll never happen to you again.

... you giggle madly when she continues, "But... should I be worried that there's dust on top of the package?" and then have to stop to explain.

Help me add more to this list?