I used to do it too. But those days are long gone.
While some couples 'sleeping planets' align perfectly and they can lie next to each other in perfect harmony, some do still have small niggles that need some attention. The temperature of the bed is a very common niggle. But fear not - there are companies out there that have heard the call.
(Disclaimer: this is not a comprehensively researched blog entry and there may indeed be companies that have a similar solution, but not a cheesey video, so I didn't include them)
First there's CosyCool adjustable duvets (doonas). The company's video to describe how their 'solution works' wasn't quite as entertaining as they may have intended it to be, but it gets the message across.
Maybe there's just not that much money in tog-adjustable duvets (doonas) and CosyCool hasn't been able to really sink some big bucks into an advertising campaign as yet.
Then there's the Twovet - the duvet for two who brush off the suggestion of sleeping apart to solve temperature problems - herecy!
Another solution that I can offer is to purchase two differently weighted single duvets (doonas) and enjoying your own bed clothing that can't be wrenched from you in a dramatic rolling manouvre during the night.
While the solution does not make for a very interesing product or possibly a great video. It's simple and doesn't require an overseas purchase.
If social modesty inhibits such a brash display of individualism, may I suggest a cover is strategically placed over the single doonas to give the illusion of togetherness.
So once again planets can align, and mars and venus can lie peacefully next to each other.