vaginal
Pictures depicting pussy/vaginal penetration, whether by fingering, hetero sex, etc.
If, and only if, a penis is doing the penetrating, the image should also be tagged sex.
Note: Do not confuse this tag with the pussy tag, which refers to female genitalia. If the character's vagina is clearly seen, It should be tagged with pussy.
The following tags are aliased to this tag: vaginal_penetration and vaginal_sex (learn more).