Does this work?

[Malc]

I decided to spare youse all a long drawn out debate. Does this work better?

[Vulture]

I didn't find it quite as funny as the other one but I think the punchline would be more  understandable to those who don't know the words of the song. 

[Malc]

Hmmmm...

[Mince]

It's quantum theory at work.

L ? U = h

where L = laughter content, U = understandability, h = Planck's constant.

As L increases, U decreases.

[Malc]

My sister Cath solved the whole problem. I just phoned her in Saltcoats, and she said "put thae wavy lines wi' music comin oot and huv the words 'STEP WE GAILY ON WE GO' waftin' in the background".

To think we thought she was the thick one.

[Tarquin Thunderthighs lll]

Good to see your sister still has her Scottish accent, an' a'.

[Malc]

It's finished now, and I'm not showing it to you. You'll see it in the Readers Digest and I'll get paid loads of money, so thrrrrrp.

I'm going to bed. Night night.

[Roger Kettle]

It works well, Malc, and I can't wait to see it in the dentist's in four years.

[The Peepmaster]

How about changing the caption, Malc:

"We just sing "Ging-Gang-Goolie" at the Scout Fair, Mr Johnson - we don't show them to the ladies!"

Ha ha ha ha ha

Use the caption that got a laugh, Malc. I'll be happy with just a split of the profits.