The term "Lucy Pierre" originated as the movie title, "The
Adventures of Lucky Pierre". The movie was released in 1961 and was
noted for its nudity and humor being acceptable in popular
culture.
The "Lucky Pierre" is a sexual position that is performed during
either a three man or a man-man-woman threesome. In a Lucky Pierre,
the man in the middle is penetrated by the man behind him while
penetrating the man in front of him or the man in the middle is
having sex with the woman while a man is having anal sex with him.
In the "Lucky Pierre", all participants are having sexual
intercourse with one another at the same time.