If they do, it could be because they want to feel more like part of the family, or it's just a particular animal's personality and that animal was matched with the person meant for it.
How come the invisible dogs are so much better behaved than real ones? When I run my invisible dog for agility (aka walking the course), he always qualifies. Well, except when I was running my invisible Jet the try-ing.
Ms. Rita Jean:
I have yet to locate the off switch on any Basenji and I've been around them since I was a baby. When you find it, you will let us all know, right?