Nice doors!

According to some of the answers in this article:

The Chinese consider red to be a lucky color. Many doors are painted red before the Chinese New Year and in Feng Sui, a red door symbolizes the mouth of the home allowing chi to be drawn to the house. In America a red door was a sign of a home that was a safe stop for travelers.

If many cultures share similar regards concerning red and doors, maybe we have some deep relationship with this symbolism which provides us with comfort? Just a thought.