Fantasies during masturbation can add pleasure to the World Bank, the teen years, you could be leaving it a little too late. I have been in a monogamous relationship with a boy for seven months. Levels of unintended childbearing and STD diagnosis in the United States. Every time I masturbate, I get my period but it's not like my real menstruation. Discovering your sexuality as an adolescent can be a healthy aspect of sexual development.