Gotta ask how come you 2 switched from you hubby wife to him hubby and your ex wife if you still play all the time?? Just curious.As I understand the term "Lucky Pierre" it is a man who is penetrated anally while he is fucking either another man or a woman.
The term would certainly characterise me in my menage-a-trois with my wife (now my ex) and my young black bisexual buddy and homosexual lover (now her husband).
It would also characterise my versatile buddy when he is fucking my ex in the missionary position and I "back him up" by penetrating him from behind, and eventually cum in his butt. My buddy and I frequently and freely change roles in a single encounter with my ex who has observed that our orgasms are very intense and convulsive when we ejaculate in one another.
A huge bonus for my ex is that my buddy's thrusting and ejaculating in her is much more powerful and satisfying for her when I'm backing him up and thrusting into him in unison with him thrusting into her.
Thanks