Funny or slightly worrying ?

Me neither. It seems a strange thing to do. Have you discussed it further? I’d have had to.

Did you not ask "is that not the one we got for DS?"

DH may have been with you (physically) when you bought it - but probably 'tuned out' mentally on your shopping trip. It just seems typically male to me (and funny). Can you get another jumper? They can be a matching pair!

Why not just ask him about it ninathenana

I find this quite funny and no I don't think you should be worried! He was distracted and thought the jumper was for him.
The same thing would happen here, except that I hardly ever get DH to go near a clothes shop.

Yes of course I talked to him about it. I said it was the one we bought for DS he just said he'd forgotten and when he found it in the wardrobe he assumed it was his.
I think him saying about it being in the sale was a hasty attempt at a cover up when he realised what he had done. When I said about it not being in the sale he just said that he thought it was.
He did tell his cousin about it, who laughed. So maybe it was just a memory slip.
I have replaced it.

I think Hetty58 is right. He might have been with you, but if you were chatting about different presents and recipients, he probably just stopped listening. I know my DH glazes over if he’s not interested in what I am chattering on about!

And the jumper was put in ‘his’ wardrobe.

Calendargirl, both my husbands were expert in appearing to be listening and interested - but would later deny any knowledge!

It’s the sort of thing Mr C would do. Selective hearing .

It's the kind of thing that Mr C would do as well.

Last week we were going to visit a friend who was having an 'at home' for his 90th birthday.
DH came down in his 'best jumper'.
I asked why he was wearing a jumper with a bleach stain and he said 'it's my best one'.

No, it was the same colour as his best one .....