When I turn 18 my interest for sex increased and I was constantly thinking about it. I'm very shy with boys and the only man I had around was my step-father. He knows me well, we talk a lot and he noticed my change. He caught me watching his porn channels on the TV and we started to talk about sex, I told him I always have my nipples hard and stopped using bra because I like to see his reaction when he looks at me and sees my pointing nipples under my blouse...