The first Thanksgiving after we were married. DH didn't have the day after Thanksgiving off of work and we didn't want to drive 3 hours each way for one day. We had some friends over that were in the same situation. I have probably cooked a Thanksgiving meal 3/4's of our married life.
I'm 32 and haven't done it yet. It's either been my mom, the guy I lived with, or a friend of mine. I do cook little pieces of it but not the main dishes.