There are two pairs of obstacles. No self-test here, it will inevitably be two to use it. We start with the thighs and then attach the wrists. The posture makes that quickly one folds his legs and the calves are found near the thighs. This is also convenient for some positions.
The straps are comfortable, and allow to stay attached for a moment. Your naughty game can last.
However, pay attention to the feelings of the person attached, safety is important!