Part of this journey towards being an adult is to define your own emotional responses, your inner self and how you can relate to people. I can imagine that over the last couple of years you have begun to be aware that one day you may want to leave your family home and become more independent. But on the way to this goal would be for you to test the water so to speak as far as how much independence you can exhibit while you are still at home. This is where arguments can happen between family members. Along with developing your emotional maturity I can see that you are now experimenting with sex.
Sex is an important part of our lives and it is an important part of any intimate relationship.
As far as the types of sex that you have this will be determined by what you have seen or learnt about over the last fourteen years. This education will continue, and if you are astute enough then you will be able to continue this learning curve about sexuality for the rest of your life. Having sex with another person can include all of your morals and values that you are establishing. For some people, the only way that they can have sex is to threaten or rape another person. There are loads of people in this world that are bi-sexual.