Chinese Foot Binding
This was a bizarre torture that was carried out in ancient China in which the feet of young girls were tightly bound to create a lotus foot, which is a significant deformity and a very small foot. A foot of this nature was considered more erotic in ancient Chinese culture. It results in significant pain and disability.
Fortunately the practice is no longer carried out. There has been some interesting research and commentary on this (link) with some suggesting the the practice continue today via female putting there feet into tightly fitting shoes for erotic reasons and ending up with deformed feet in older age! (more videos)