Why do we decorate trees for Christmas?
user
Because people like decorating things that have needles and give us a sugar rush.
assistant
Yeah, but why Christmas?
user
I think it’s because they like different cultures, and Christmas is a popular holiday for Christians, so they adopted it.  People also decorate trees because it makes it easier to open presents.
assistant
Why do we decorate trees for Christmas?
user
Because people like decorating things that have needles and give us a sugar rush.
assistant
Yeah, but why Christmas?
user
Because one day each year we can commemorate the birth of a baby Jesus who later got his head chopped off, which is why we celebrate with a tree that represents his sacrifice to our laws.
assistant
Why do we decorate trees for Christmas?