Is it right for my parents to be so nosey about my friends?

Ok so every time I go out, my parents ask me who I'm going out with. If they don't know my friend, they'll ask me to bring her over so they can meet her first, and than they ask her for her number. That is so embaring, why do they have to do this? If they want to meet my friend, than ok fine, but they don't need her number. They only want it so they can call her and see what I'm doing, they just want to spy on me.