When the whole head of someone is inserted into someone else's body or their own, usually by accident or for extreme sex.

If only part of the face is inserted due to intense oral sex, please use snout_fuck instead.

If they are being swallowed, eaten, or absorbed, use one of the following instead:

• vore - If being eaten or swallowed
• anal_vore - If being swallowed by/sucked into an anus

unbirthing - If being swallowed by/sucked into a pussy
auto_vore - If being swallowed by/sucked into their own pussy, anus, or other bodily orifice
auto_unbirth - If being swallowed by/sucked into their own pussy

See also

• penetration

snout_fuck
head_in_ass
head_in_pussy
partial_vore