/kloc-Is it normal for children aged 0/8 to watch unhealthy videos? What should I do?

18 years old, according to the mature speed of the younger generation, he is not a child at all, but an adult who knows himself and should be responsible for himself, so such behavior is completely understandable. As long as he controls such behavior in a reasonable and legal way, does not infringe on the legitimate and normal interests of others, and does not have a negative impact on his normal life, then there is no need to worry. Of course, if conditions permit, correct educational guidance is also a very encouraging behavior, which is also the responsibility of a parent.