The Finnish study came after research from The Netherlands found a gene responsible for serotonin regulation tied to premature ejaculation. In that study, 200 men were surveyed. Recently, Finnish researchers interviewed over 3,000 male twins and their brothers about their first sexual encounter. Most individuals reported that “they had suffered from erectile dysfunction and premature ejaculation at their first sexual encounter." Although this research shows a genetic link to premature ejaculation, environmental factors such as intoxication or anxiety still play a role. It is suggested that both drug therapy and psychotherapy be considered as possible treatment for sexual dysfunctions, even if genetically rooted. The study, "Prevalence and Determinants of Male Sexual Dysfunctions During First Intercourse," is in the March issue of Journal of Sex & Marital Therapy (Volume 35, Issue 2), online and in print..