From Quentin Tarantino On His ‘Once Upon A Time In Hollywood’ Novel, Retirement, Fatherhood, And Other Great Tales: Deadline Q&A:

DEADLINE: At what age will you be comfortable letting your son Leo watch your movies?

TARANTINO: That depends on his interest. If we’re judging by me, I saw a lot of stuff early on when it came out, you know, so I would imagine [early]. If I had to imagine, he would probably, as a little boy, be most attracted to Kill Bill, anywhere between 5, 6 or 7.

DEADLINE: I can still remember taking my little boy to see Borat when it opened. When Borat had that naked wrestling match in bed with his portly companion, I laughed hard but when I looked over at my son, he leaned over and said, “Dad, I’m not going to be able to un-see this.” I looked around the crowded theater, and only then noticed he was by far the youngest person. I thought, “I’m going to hell.”

TARANTINO: That discussion is a whole big part of Cinema Speculation. During the whole New Hollywood period, I was seeing these movies at 6 and 7. I saw Point Blank when it came out in ’68, when I was between 6 and 7. All the exalted New Hollywood movies, those were the movies I grew up watching, and that’s a big part of what the next book’s about. I’m writing about some of these movies from my perspective now, but I always touch on my perspective from when I first saw them.