You know who loves Christmas? Dogs. That's because they love everything.
And dog owners love sharing the holiday season with their dogs. They get to give their dogs toys, and treats, and maybe another dog. In return the dogs give back all the same things they normally contribute. It is kind of a lopsided arrangement but it seems to work.
The one and only new thing they give is the chance to take cute, festive pictures of them, and that may be the greatest gift of all.