Teen's Smartphone need Privacy???

There are something which parents need to understand. I have a lot of topics to write over. I will tell you why a teenager locks his/her phone and don't want to show it. I have taken a very general example to explain it I hope you will understand it. I have seen many parents taking whole control over their daughter/son. Well that's not bad sometimes it's good to put up some boundaries. But..... Problem arises when parents try bump in their daughter's or son's smartphone. Because parents think that it's not bad to check his/her phone because they should know everything about their son/daughter. Here I will ask you a question? "Have your son/daughter ever asked you about your sex life or how many girlfriends/boyfriends you had ??" Obviously "NO". If he/she will ask you such question, you guys will never answer it or directly scold him/her for such foolish question. If we aren't asking you about your personal life th...