Have you heard the parody "The Envelope" to the tune of "if You're Irish, come into the Parlour" by the Irish comic Conal Gallon?
It's all about bribing politicians by slipping them some money in an envelope. Conal tells a joke part the way through about politicians.........

.....They're like bananas, they start off green, then they turn yellow and by the end there's not a straight one in the bunch!!

Will transcribe the lyrics later if I get the chance.

best wishes, Yvonne