You can get round it by asking them if they actually want anything and that way you can also not fuck up giving them the present as well, I think most of my family has finally agreed the secrecy part of Christmas is stupid and doesn't work.
The Origin of Christmas Presents
In pre-Christian Rome, the emperors compelled their most despised citizens to bring offerings and gifts during the Saturnalia (in December) and Kalends (in January). Later, this ritual expanded to include gift-giving among the general populace. The Catholic Church gave this custom a Christian flavor by re-rooting it in the supposed gift-giving of Saint Nicholas.
Thats why we giving each other christmas gifts