Lad, it's your duty to find ye a lass
With child-bearing hips and a pink, supple ass
And make her your wife and love her with love so true
Now some rivers run high, some rivers run low
When her river runs red, then she's starting her flow
And it's called menstr'ation, and here's what it means to you
You will notice her bloomers are spotty at first
Stand back