By Andrew Edstrom and Nat BennettWe love pair programming. Between the two of us, we've spent more than 15,000 hours pair programming. We’re more productive, learn more, and have more fun writing code together than alone. We think pairing has made us better engineers and better people, and we think more people should try it.We also know it’s hard. We’ve had days where all we did was watch our pair type. We’ve had days when we couldn’t seem to get our pair engaged. And we’ve had days