Typing In My Shadow

Me and Co-Worker sit about 10 feet apart. It is very open. My back faces his side. I cannot see him and he can only see me if he turns around 45 degrees. But we can hear each other..too well if you ask me.
Lately he has been typing up a storm. Literally. We have somewhat new keyboards and there is no way any of us can type without anyone not hearing the keys. And he must be typing a novel. He types all day, every day, and let me tell you our job does not require that much typing.

BUT HE ONLY TYPES WHEN I TYPE

Do you know how annoying that is? Really? If I start an email, he'll start typing. If I'm working on a project, he'll type away. Update my blog, yup, there he goes: type, type, type, type, type.

At first I thought that I was paranoid. Then I did a little experiment. I was working on a project in an Excel spreadsheet. Each cell only needed me to type a Y or a N. I started to do so--since I type fast, it sounded like I was typing a paragraph, I'm sure. Then Co-Worker went to work on his typing masterpiece. Huh? So, I went real slow. Like a second per cell slow.
I was right. You know he tried to type super fast as to type as much as he could when I was only typing one letter.

Then there is when I stop and he has to stop. Type, Type, Type, pause then he sounds like he is trying to sneak words in on his whatever and his fingers are poised in position ready for when I start back up again. When I do, he races to get any and all words in.
What the fuck is that?

This must really be messing up his stamina in some way, right? I am so evil that I play typing games with him all day long. It is very entertaining.
I'll decide to type a long email and then in the middle of his typing marathon, I'll just stop--BAM! and walk away from my desk for a long break.
I'll come back and type, let's say three words and stop again.
Wha ha ha ha ha ha!!

You may be thinking why is he typing only when I type?
Good question. I think it's because he doesn't want our boss to know that he is typing and she knows it's not work related because like I said, we don't type that much. I don't care if she hears or not but maybe that's because I really am doing projects (that he fails to keep up with or volunteer to do).
Then I let her in on my theory. She's one smart boss, she totally already knew that. She laughed her butt off when I told her that know that I am aware of it, I do it on purpose and type-tease him. Fun times in the office, let me tell you.

Goes to show, he thinks he is so sly but we are all onto him. There are so many other "trickery" that he does that we know about. Maybe I'll write more about those later.