I grew up knowing that Santa didn't exist. My parents had to then explain to me that I couldn't tell certain kids about this because their parents wanted them to still think Santa was real until they were a bit older. I still remember being quite shocked that these parents were lying to their kids, along with grandparents and other family members, and then expecting even me to join in. I was further shocked by the fact that most of these kids never worked it out themselves and had to eventually be told by their parents or a group of their friends (being told by one or two friends usually wasn't enough.)

So, while I never experienced the shock of finding out that Santa wasn't real, watching these parents lying to their kids about Santa again and again certainly left a strong impression on my young mind.