I thought this was a great question to ask! I have wondered about that myself. I have two dogs a black lab and a rotty. The lab slept in my bed since the day I got him about 7 years ago up until I moved in with my boyfriend a year ago. My boyfriend is a big guy, and so is Buster, the lab... even though we have a california king bed, there isn't room for the both of them. The rotty never slept in the bed. She has gotten up there a few times, but has gas too often! lol One thing that used to be nice was that my lab was very polite in the bed - like yours, he would scoot over if I woke him up and told him to.