I'm going to forget my youth friends child and wifes birthday.
Why would you forget the child's birthday? What happened?
Nothing, I just don't have a very good memory.
You should remember important events. If you forget things it helps to write them down on a notepad or calendar.
Write them down? But I'll just lose the paper.
Often writing things down helps you remember even if you don't check the paper itself. Or you could use apps on your phone or PC.