John Lennon had multiple affairs, ‘loud, raucous sex’ with woman at party — and ‘stunned’ wife Yoko Ono overheard

It wasn’t a complete accident that John Lennon had an affair with May Pang.

From September 1973 to 1975, the Beatles icon went on his so-called “Lost Weekend,” which involved an 18 month-long binge of sex, drugs and booze.

Elliot Mintz, who was close friends with Lennon and Ono, told The Post while promoting his new memoir, “We All Shine On: John, Yoko, and Me,” that the Japanese singer exiled her husband to Los Angeles with Pang, who was their assistant — which led to the pair having a full-blown love affair.

According to Mintz, it all began when Lennon had “loud, raucous sex” with a woman at political radical-turned-Wall Street investor Jerry Rubin’s party in 1972. Ono heard everything, leaving Mintz stuck in the middle of the couple’s drama.

“Sometimes [dealing with them] became an intrusion,” said Mintz. “At what point do you rein it back in? Keep in mind that I never was paid.”

He wrote: “Throughout it all, Yoko sat on the sofa, in stunned, mortified silence, as other guests began awkwardly getting up to leave — until they realized that their coats were in the bedroom where John was having sex.”