Orgasm
Multiplicity

There has been little scientific study of multiple orgasms in men. Dunn and Trost defined 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". Although, due to the refractory period, it is rare for men to achieve multiple orgasms, some men have reported having multiple, consecutive orgasms, particularly without ejaculation. There may not be an obvious refractory period, and the final orgasm may cause a refractory period. Multiple orgasms are more commonly reported in very young men than in older men. In younger men, the refractory period may only last a few minutes, but last more than an hour in older men.
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