Both wrists in both cuffs!
We had this great idea to lock both wrists in both cuffs of a regular pair of handcuffs. Well, it’s not as easy as it sounds. Even a bit painful. And very risky!! Do NOT put the keyholes facing each other or you will be stuck for life! You need small wrists for this, because regular handcuffs are apparently not made to fit two wrists whhahaha :D