Oh! That's not what I was suggesting. I was wondering if you'd like to go to a restaurant with me? Somebody professional cooking, so you wouldn't have to concern yourself with it, and we can focus on our conversation.
In that case, please do.
Why? I suppose our ancestors who were more reverential to and worshiped nature had their reasons, which included the celebration of life in the midst of winter when nature is dormant, but nowadays, it's just pretty and celebratory. If you'd like, you can get a tree, but there's no obligation. Has nobody where you live suggested one yet?