The Truth About Premature Ejaculation

Researchers in Turku, Finland have linked premature ejaculation to a possible genetic factor. Their study included interviews with over 3000 twin men (1500 pairs) who reported similar experiences with premature ejaculation. This study seems to confirm an earlier Dutch study that linked premature ejaculation with  serotonin levels, which are commonly associated with genetic factors. There is also evidence that men who suffer from premature ejaculation may excel at activities that require quick reflexes.

http://psychcentral.com/news/2009/05/28/genetic-link-to-premature-ejaculation/6152.html