I don't know much about geography now
Don't know much about trigonometry now
Don't know much about the algebra
Don't know what a slide rule is for
But I think I know 'bout the use of a simple comma.
With the Lucifer comma, the gentleman brought his pet goat, Memo, to the march.
Without the Lucifer comma, the gentleman brought his pet goat Memo, to the march, as his other pets were left back in the ranch, croaking and bellowing, booming and cowing, and chuckling and chattering in disgust.
And for what it's worth, here's the Oxford comma, which we employed to invite the strippers, Kennedy, and Stalin. But when we omitted it, we invited the strippers, Kennedy and Stalin.