Since the earliest of times, trees, especially green evergreens, were worshipped by the pagans. To them it represented life and freshness. Since it was EVER green, it always had life. The trees were worshipped as symbols of life, fertility, sexual potency and reproduction.
These pagan rituals of worship were then brought into the homes and set up as idols, with the belief that it would give men a heightened potency of sexual virility to procreate new life for their harvest god in the new year. The evergreen tree represented a "PHALLIC" symbol (the mans sexual organ of reproduction) set in an upright position.. Any wonder why people hang round balls on a tree?
Is having a Christmas tree in your living room like putting a big, green, erect penis there to put presents under? And if so, how can one reconcile this practice with Christianity?
You need to put up a whole bunch of boobies and vaginas around the house to balance it out.