擬牝台
A device used to collect [[cum|semen]] from [[horse]]s by encouraging them to “mount” it. Essentially a  “heavy duty [[artificial vagina|onahole]]”.

It is frequently featured in numerous [[futanari]] works to handle large [[penis]], and since humanoid characters were often depicted using it, a handle are often added to its side.

h4. See Also
* [[sex doll]]
breeding mount