Back in the early 90s I worked for a small company that had a Boxer dog. She liked to sit right behind my chair, which had two problems. First I had to remember

Back in the early 90s I worked for a small company that had a Boxer dog. She liked to sit right behind my chair, which had two problems. First I had to remember that she was back there. Second, whenever anybody came to the front door of the building (postman, courier, etc.) she’d explode into furious barking, which would make me jump and set my heart hammering, especially if - against the odds - I had achieved deep focus. I used to say that she was taking years off my life.