I have been mulling this one over and read this article about race and Santa and come to this conclusion... There is no boring, hard, expensive thing done mostly by men where the credit is given to an imaginary woman. Or is there?
In my childhood home, my DF did the stocking buying and Santa took credit for only the stocking. But there seem to be lots of houses where women buy all the presents and they ALL come from an imaginary man. And those women seem to be the most vehement about the 'magic' and not taking credit and being selfless and never telling the kids.
It's festive sexism. 