Also known as: 三角木馬, 三角木马, 삼각목마
A wooden horse is Bdsm furniture, consisting primarily of a large upturned wedge. The person subjected to the device straddles the wedge like a horse (hence the name) and typically experiences pain from their weight forcing the edge up into their crotch.
Not to be confused with a Rocking Horse, a safe toy for children.