The book presents research studies where models and theories of nursing from the perspective of sexuality were used. Theory is essential to explain and understand nursing practices. Likewise, it favours planning, predicting and evaluating the outcomes of care. Therefore, the theoretical approach is a useful tool for reasoning, critical thinking and, in addition, it helps nurses to be able to use and manage all the information about the patient and to manage the practice of care in an orderly and effective way. The use of conceptual models of nursing in care ensures that all nurses share a common language and similar conceptions regarding the nursing, person, health, environment and care paradigms that characterize the professional role. Here, a reflection is posed about what still, and even though it is a very important topic, maintains the dichotomy between nursing practice and nursing theory. The book is aimed at undergraduate and graduate students in the area of health, as well as at health professionals interested in using such models or theories related to human sexuality in different age groups.