We don't do them. It's not that we don't like each other or that we're stingy. It's simply that we both have mountains of "stuff" and because we don't live in each other's pockets (Cornwall and Lincolnshire are separated by a large chunk of England) we don't necessarily know what might make an appropriate gift anyway.
This year, as the festive season approached with alarming speed, I found a parcel on the doorstep with a note attached saying something along the lines of "saw this, couldn't resist despite our 'no present' rule".
And so, to Christmas Day and the grand unwrapping ceremony.
Thank you, Sis. It will be hung alongside a photo of you performing one of your far-famed cartwheels. I think that should give the right impression.
Oh - did I mention cartwheels at all?