The act of shoving ones head up the anus of a man. This requires either surgical modification of the sphincter or EXTREME anal training with buttplugs. I honestly cant imagine this being possible, but theres some fuctup people out there and Im sure its been done by somone.
Helming - (verb) The act of working the top of ones head into a vagina. When complete the owner of said vagina sits atop the head like a helmet.
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