It's a gay bondage device. The larger loop goes around the neck while the smaller loop goes around another man's privates. Thusly locking the two men into a face to privates position.

It's an old surgical tool for removing haemmeroids. The jagged portion was inserted in the 'backside' then a rope was attached to the hook. The other end of the rope was attached to a horse which was then startled causing it to gallop away. When the slack was taken up, the entire sphincter was ripped free thus ensuring that the haemmeroids would not return. The procedure, while having a 100 percent effectiveness rating, did not have many survivors.