Revised rule....
Morning wood should be considered mandatory. If you wake up without your 'lead singer' you have two options. Option one, you can pray to Jepman for forgiveness or Option two....you're a girl and it doesn't matter. (Attractive) Women can be forgiven for everything except morning talk shows and purses.
The obvious medical reason that your 'morning sap-spring' high rises every morning is simply because every night when we sleep or 'recharge our faith in Jepism' as I like to call it, we replenish our body with millions of tiny 'Jepmoleculons' that help us keep such a dedicated and strong connection to Jepman. So if you wake up without a 'corked bat', you obviously weren't worthy of recieving your daily dose of 'Jepmoleculons'. If you fail to pray for forgiveness, well..I don't even want to think of the consequences.
Think while it's still legal.