Do one thing and do it well

I've been enjoying living with a nice dog named Charlie for the last couple months. She belongs to my roommate. She's part chocolate lab and part Chesapeake Bay retreiver. It's great having a pooch around to play with and pet. She has warmed up to me quite well. But lately my role in her life has been pingeonholed. I used to be a multi-purpose petter, normally of the ear and neck area. I was even good for a tasty morsel from time to time. Now, though, she approaches me and when I reach out my hand to pat her on the head she immeaditely turns and faces her butt at me. She loves the butt scratches more than anything else and apparently thinks I should provide her with them to the exclusion of all else. I guess that I am glad that she likes my scratches the best, but it is kind of like being a garbage man. Everyone agrees that the job has to be done, but no one really wants to do it. Here's to all the garbage men, ditch diggers, etc...