I always look up the movie I'm watching on Wikipedia, it ruins the plot but I do it anyways.
That's odd. Why do you look up the movie on Wikipedia if it ruins the plot for you?
I'm curious and can't help myself.
You're ruining your own enjoyment of the movie by looking up the plot before watching it. Watch the movie without looking up information about it beforehand.
It's my life, I'm going to do it anyways.
I mean I just don't get why you want to ruin the movie for yourself. Don't you like being surprised by what happens? If you read about the ending before you see it, you'll never be surprised by it.