Ode to Frank and Bill

This was from my English 20 class so many years ago. The assignment was to make a parody of a nursery rhyme. When this failed, I had to rewrite it.

Frank and Bill went up the hill
To make love in the hay
Their mums came up and with a great shock
Found out that their sons were gay

The two flustered teens pulled up their jeans
And tried to explain to their mums
They said, "now boys you have a choice
But properly use your bums."

With a kiss on the mouth they went down south
Where homosexuals can be wed
Frank wore the dress and soon they were blessed
And hurried right off to bed

Now, Bill was a trans with masculine hands
And that really appealed to Frank
A man-about-town, Bill slept around,
And slowly turned into a skank

Frank finally heard and without a word
His anger became less mundane
So later that day, in a feminine way,
Frank promptly blew out Bill's brain