A fulfilled sex life is indispensable for most functioning partnerships. So it is all the more problematic when sexual intercourse no longer satisfies both partners: if it doesn't last long enough – or no longer happens at all – because of erection problems.
Testosterone is the male sex hormone and is formed in the testes. It has important functions in the various phases of life. In unborn babies, it ensures the development of the male sex organs. In puberty, it is responsible for masculinization.