Two from my father:

There was a young woman named Wylde
Who kept herself quite undefiled
By thinking of Jesus
Contageous diseases
And the bother of having a child.

There was a young woman from Thrace
Whose corset was quite hard to lace
Her mother said, "Nelly
There's more in your belly
Than ever went in through your face."

And one from the after-hours singaround at the 8th Step Coffeehouse, all those years ago:

There was a young fellow named Dice
Who remarked, They say bigamy's nice.
Even two is a bore -
I prefer three or four,
For the plural of spouse it is spice."