Here is the romantic Festivus gift you missed out on:

Here are the macabre details:
* Material on which bone tissue may be cultured is provided.
* A bone biopsy of you and your partner are performed, procuring the necessary tissue for culture
* Bone tissue is grown in a lab environment
* The finished bone is finished and mounted
* You exchange rings and you are now man (and bone of wife) and wife (and bone of husband).