When a character cums into his/her own vagina/anus using his/her own penis.

The cum must be somehow transported directly into the orifice using methods including but not limited to:
* directly bending the penis back (ex: post #481023)
* using a tube (ex: post #291428)
* using a portal (ex: post #3627283)

H4. See Also
* [[cum in pussy]]
* [[cum in ass]]
* [[selfcest]]
autoinsemination