There's a PRICELESS quote from the Kids in the Hall about your period as an organization tool:

Dave: Would you just give me a minute?!
Mark: What's wrong with you? Having your period?
[All laugh; Kevin more audibly than the others.]
Dave: What if I was, huh?
Mark: Do you want to step outside?
Dave: No, I just want to have a period, that's all. Just one a month; okay?
Bruce: [quiet] C'mon guys.
Scott: Why?
Kevin: Might help a guy organize his time.
Dave: Yeah. Each month I feel my body become fertile and I'd say, "No, I choose not to have a baby. Oh Rent's due."

The transcript can be found here:
Season One Sketches - Poker Game