autopenetration

All cases where a character's penis or tail is inserted into their own body (anal, vaginal, cloaca, urethral, cervical).

This also includes unconventional entrances into the body (nipple, navel, ear, improvised, etc.)
This does not include fingers. For this use fingering_self and the type of fingering (anal_fingering, vaginal_fingering) instead.

See also:

The following tags are aliased to this tag: auto_penetration, self_fuck, self_penetration (learn more).

This tag implicates masturbation, penetration (learn more).

The following tags implicate this tag: autofisting, penis_in_own_pussy, portal_autopenetration, self_threading (learn more).

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