Things that make you think:
No one has ever heard of the perfect crime. If anyone ever does or has, it's not perfect anymore.
I have never met someone that didn't like ice cream that wasn't lactose intolerant or a filthy vegan.
There are no original plots anymore, we are so far ahead in our existence, that literally every plot device has been used in some way, at some point in the past or will be in the very near future.
No wonder Hollywood is having such a hard time.
Captain Kirk shared the first multicultural kiss on American television and Fred and Wilma Flintstone were the first couple to be shown sharing a bed.
The Bible was largely written by sinners who were inspired by God and then now serve as examples to us. If they were all perfect people,
It would be easy to discredit them at the time they wrote each book on the basis that "they've never done anything bad like that".
It is very likely that there are no or few love songs are written about girls named Ethel or Irona.
Just now, the future finished happening, while the past is infinite.
Whenever characters contact themselves from the past to help them think of something, it's literally pointless.
Because your past self literally know a less than you currently do. At the time that you go back for advice or to complete your evil master plan, you'll be meeting a version of yourself that either can't comprehend it, or is having the thoughts and ideas about it as you're having them, and then overloading your mind with new memories about yourself telling yourself about stuff you both did that you had no recollection of until you became your current self and went back in time to have those memories in the first place!
Now, going to the Future for assistance at least clears up the ignorance problem, but then your future self will remember that you came to visit them and then you'll have to endure the loop of becoming your future self, being visited by your past self and the cycle never ends.
