"Mind you" is becoming less and less common. I know how to use the phrase, but I felt like it was hard to explain the exact meaning. This website has a good answer: http://english.stackexchange.com/questions/110430/meaning-and-usage-of-mind-you
0 voted
January 15, 2017
1
Answered
To me the second question is a little unclear. If you wanted to ask why someone rarely goes out, you could say, "Why do you never go out?" or "How come you don't go out much?"