2010s kids show/movie about a magic notebook that makes you forget whatever you write down.
There is 2 boys and one girl and they go through the girls journal. It said one of them is so hot. They panic and regret reading it. So they try to forget it and go to a man with a magic notebook where you write something down to forget about it. And the man has sticky notes all over his house because he kept forgetting everything. They write her name down and then accidentally forget all about her. Then at the end she explains that it said he was hot and sweaty and gross.