Oh dear where can the matter be...

Just leaving this here for reference...

Oh dear, where can the matter be?
When it's converted to energy,
There is a slight loss of parity.
Johnny's so long at the fair.

He promised to buy me a second-hand Morris,
A matched set of H-Bombs that go off in chorus,
A musically-talented agile slow loris,
And other delights that are rare.

Oh dear, where can the matter be?
When it's converted to energy,
There is a slight loss of parity.
Johnny's so long at the fair.

He promised to buy me a used weeping willow,
A pair of chrome booties for my armadillo,
A hand-tatted, plaid, pterodactyl-down pillow,
And other delights that are rare.

He promised to buy me a magical locket,
A miniature couerl to keep in my pocket,
A duocorn stallion, a Saturn-V rocket,
And other delights that are rare.

He promised to buy me a positron beauty,
A lit'rally minded transistorized cutie,
A chrome-plated robot that does double-duty,
And other delights that are rare.

He promised to buy me an incomplete wizard,
A red-headed genie, a hexapod gizzard,
A house-broken dragon, a musical blizzard,
And other delights that are rare.

He promised to buy me a microwave oven,
Some witches from Karres arrayed in a coven,
Some teflon extrusions to further our lovin',
And other delights that are rare.

Credits: Don Simpson, and others...

One version credited to Andrew MacRobb exists that sounds like it's different from this one, but I haven't found a copy beyond this quoted verse:

Oh, dear, where can the matter be
When it's converted to energy?
There's that slight loss of entropy
Thermodynamics ain't fair!