When a male or [[futanari]] [[ejaculation|ejaculates]] while being [[anal]]ly (or [[vaginal]]ly, in the case of futanari) penetrated by either an object or a body part.

It should [b]NOT[/b] be confused for when a female ejaculates, in which case [[female ejaculation]] should be used instead. It also should [b]NOT[/b] be confused with penis ejaculation inside a vagina that is being penetrated ([[cum in pussy]]). The person ejaculating is the one being penetrated, not otherwise. 

h4. See also

* [[handsfree ejaculation]]
* [[mutual orgasm]]
* [[cum overflow]]
* [[cum in ass]]
* [[prostate milking]]
* [[pegging]]
* [[projectile cum]]
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