that is one of those little ditties that get re-written and re-arranged by everyone that hears it!...I have heard an English singer...(memory stalled!)..sing some version

"with me too-roo-roo, too-roo-roo randy...etc.." and including the line about "me wife...is ____ , she's black"..ending with.."I'm a mechanical switch" (polite version)

if it wasn't so late, I could dredge up the rest and where I heard it...