![1girl arms_behind_back bdsm blue_eyes blush bondage bound breasts brown_hair highres long_hair looking_at_viewer navel nipple_bells nipple_piercing nipple_rings nipples nude original piercing pussy red_rope rope solo thighhighs tongue tongue_out uncensored wooden_horse yashemao_qishi rating:e score:13 post #3833409](/cdn_image/preview/f4/c9/f4c944b7f89c3022f4d6215da72065e2.jpg)
三角木馬 (さんかくもくば)
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.