I went through a phase of copy/pasting double inputs. That phase ended when I copy/pasted a mistake from the first input and it caused a whole lot of hassle so

I went through a phase of copy/pasting double inputs. That phase ended when I copy/pasted a mistake from the first input and it caused a whole lot of hassle sorting it out. Now I just make myself type it twice. I tell myself it's for my own protection.