Male sexual health -- Structure and physiology of the testis -- Introduction -- The spermatozoa -- Sperm motility -- Capacitation and acrosome reaction -- Fertilization of the oocyte -- Testing substances that compromise spermatogenesis and fertility (adapted from Creasy 1997) -- Testosterone production and testosterone effects -- Physiology of erection -- Introduction -- Role of androgens in erection -- Priapism -- Physiology of ejaculation -- Drugs which compromise male sexual health -- Adverse drug effects -- Male sexual health and drugs -- Drugs which compromise testicular function -- Drugs which compromise erectile function -- Drugs which compromise ejaculation -- Database of drugs