Get advice from the experts at cosmo about sex, love, relationships, dating, how to meet men, and what guys want. Whether you want to have the best orgasm, plan a threesome, or try something new in the bedroom these sex tips will spice up you and your partner. One of the basic properties of life is reproduction, the capacity to generate new individuals, and sex is an aspect of this process. As the pioneering sex researcher alfred kinsey put it, the only universal in human sexuality is variability itself. An interdisciplinary look at the biological, technological, and social factors that influence human reproduction.