Editing Orgasm (section)

==== Multiplicity ====

There has been little scientific study of multiple orgasms in men.<ref name="Wibowo" /> Dunn and Trost define multiple male orgasms as "two or more orgasms with or without ejaculation and without, or with only very limited, de-tumescence (loss of erection) during one and the same sexual encounter".<ref name="Crooks and Baur" /> Although it is rare for men to achieve multiple orgasms,<ref name="Rosenthal" /><ref name="Schill">{{cite book |vauthors = Schill WB, Comhaire FH, Hargreave TM |title = Andrology for the Clinician |isbn = 0-495-81294-3 |publisher = [[Springer Science & Business Media]] |date = 2006 |pages = 105 |url = https://books.google.com/books?id=5Ts_AAAAQBAJ&pg=PA105 |access-date = April 15, 2019 |archive-date = February 27, 2023 |archive-url = https://web.archive.org/web/20230227055229/https://books.google.com/books?id=5Ts_AAAAQBAJ&pg=PA105 |url-status = live }}</ref> some men have reported having multiple consecutive orgasms, particularly without ejaculation.<ref name="Crooks and Baur" /> There may not be an obvious refractory period, and the final orgasm may cause a refractory period.<ref name="Wibowo" /> Multiple orgasms are more commonly reported in very young men than in older men.<ref name="Crooks and Baur" /> In younger men, the refractory period may only last a few minutes but last more than an hour in older men.<ref name="E. Jones" />

An increased infusion of [[oxytocin]] during ejaculation is believed to be chiefly responsible for the refractory period, and the amount by which oxytocin is increased may affect the length of each refractory period.<ref>Panksepp, Jaak (2004). ''Textbook of biological psychiatry.'' [[John Wiley & Sons|Wiley-IEEE]]. p. 129.</ref> A scientific study to successfully document natural, fully ejaculatory, multiple orgasms in an adult man was conducted at Rutgers University in 1995. During the study, six fully ejaculatory orgasms were experienced in 36 minutes, with no apparent refractory period.<ref name="Rosenthal" />