My parents took me to see The Man Who Fell To Earth when I was like four years old. Even then, I was like, this shit is really, really weird. At the time I chalked it up to the fact that it, like the rest of the world of adults at that time, was just incomprehensible to my little kid mind, until I saw it on TV late at night in college and realized no, I was right all along.
As it turns out, I was also right that all the adults around me were weird as hell too. In a genuinely freaky way, not in a "people-are-fucked" way.