There’s something sinister and creepy about seeing a brother and sister sing this song together. Even more so when they do it while looking lovingly into each other’s eyes.

And that’s before you address the central issues – that they were only 16 and 14 at the time. And they’re both Osmonds. As if one wasn’t bad enough, they had to go and fuse the perfect hair and shining teeth behind Puppy Love AND Paper Woses.

As always there’s a story behind it.

It’s a cover, of course, though I never knew that when this version plagued the airwaves in 1974, because it had never been a hit in the UK before Donny and Marie took it to No.2 in August 1974.

It was first recorded way back in 1957 by a black duo called Don Harris and Dewey. Then by a white couple, Dale and Grace, in 1963. No prizes for guessing which one fared better in segregation-era America.

In a historic side note, Dale and Grace (nope, me neither) had gone to Dallas to perform it on TV on 22 November 1963 – the very same day that history overshadowed their mawkish duet.

In fact they apparently waved to President Kennedy’s motorcade from a “vantage point” – no, not a “grassy knoll” – outside their hotel on Main Street, with other pop stars Brian Hyland and Bobby Vee.

Anyway, just after the motorcade turned into Elm Street, Lee Harvey Oswald went and blew their chance of being on Dick Clark’s Caravan of Stars that night. But, in a happy twist for them (if not JFK), their song still went on to top the US charts.

Donny and Marie’s version fared almost as well, but no one was assassinated in the course of getting there. We can blame Jack Ruby for that.

I remember being baffled by the weird way they garble the words of the song (“I’m…. LEAVINIDALL… up to YOOOOU-hoo-hoo / You deci-hide… WHATCHAGONNA do”) and I still am.

You decide: is it a deliberate comedy thing? Or are we through?