Are you a dog lover? I am. I truly believe they are man's best friend. 
I agree.  How did they catch that nickname?
You know, I'm not really sure, maybe because they perform so many different roles for people? 
Do you own a dog?
Not currently. My most recent passed away a couple of years ago and I haven't been ready for a new one. 
Was your dog protective of you?
He was, but not overly so. Do you own a dog?
Yes; two actually.  One is very protective.  The other just barks at everything.