Which is more distracting, e-mail or pot?

You know when you see a question like that, the answer has to be e-mail. Otherwise no one would ask the question. Read more on lifehacker.com.
There is something really seductive about that little "bing" signalling new e-mail that's hard to resist. What I've done is set my controls so I have to manually get my e-mail to download. That way, it doesn't interrupt my stream of consciousness, or take me on a digression that lasts the morning. Does that mean that it's okay for me to fire up a doobie? Yeah, right.