The person in the middle position of a three person threesome. To achieve the status of Lucky Pierre they must be both penetrated by the person behind them and penetrating the person in front of them simultaneously.
This is not an exclusively
homosexual act performed by three gentlemen. It can be performed by one lucky gentleman and
two ladies, one of whom is equipped with a strap on dildo. It can be performed by two bisexual gentleman and a lady, it can even be performed by three ladies sharing two strap
ons. The possibilities are numerous.