Human sexuality involves sexual attraction to another person, which for the most part is to the opposite sex (heterosexuality), some to the same sex (homosexuality) or some having both (bisexuality) or not being attracted to anyone in a sexual manner (asexuality). Human sexuality is determined by many factors, like cultural, political, legal and philosophical aspects of life, but also morality, ethics, theology, spirituality and religion. Sexuality is as old as mankind and interest in sexual activity is very much related to the onset of puberty and the period of schooling. In this book, we have gathered papers from around the world in order to discuss issues of sexuality from an international perspective.