 Believing in Santa Claus grew you up, actually maybe, at least according to some psychologists. They suggest that perpetuating the Santa myth teaches kids that lying is okay, especially since kids don't know how to lie inherently. It's a learned behavior, mostly from their parents, with studies showing that less honest parents result in less honest kids. But, research shows that the folks who are most screwed up when kids find out that Santa isn't real are the parents. In one study, they were the ones that were predominantly sad, and the good news is that one survey shows there to be no correlation between being told the Santa lie and having a good relationship with your parents. It may have just turned you into a distrusting liar.