honestly, kids should more go outside instead of watching weird ass stuff that they should not see.
Dang aren't we forgetting about adults?
this world might be mostly full of kids.

basically yeah, maybe some meditation will work and that memory will be gone.
The "dirty mind" shit will appear when you saw sexual content and you see maybe a video where a thing in there, reminds you of that sexual content so your brain reacts with "hoho shit my mind dirty dirty I'm on the naughty list now"
It mostly occurs on kids. Some kids made sexual content and other kids watch those and get "dirty minded" from it, it will repeat.

Yeah it's hard to avoid that kinda stuff tho

Probably if your brain had watched unholy shit
those unholy things will be in the back of your brain which is "long term memory" and that's how the "dirty mind" thing is developed