I started regularly viewing porn since 8 or 9 years old. To this day I'm not into "pro" porn or any other type of strange porn, just amateur couples filming themselves fucking. I watched indie European movies with my parents that had full nudity and penetration before that age even. Despite my other character flaws, I don't actually have any sexual hangups, harmful fetishes, etc.

I have literally no problem with my future child watching a video of people having sex.

Even before internet, many (most ?) teenagers had access one way or another to sexual contents. Videotapes, magazines and so on... I wonder why it's such a big deal. I think it's the role of the parents, or even school, to educate them about this.