The Love Rebellion (1967)

Young Wendy Fletcher accepts an invitation to a love-in from some artists who participate in group sex. The partygoers are infatuated by her innocence, and the entire group takes her to bed. She returns for more parties, but she rejects Hank, a sadistic poet; Hank then turns his fury on his mistress. He whips her and then extinguishes his smoldering cigar on her breast. The experience unnerves Wendy, who returns home to find her boyfriend, artist Bellman Carpenter, in bed with her mother. The shock sends her reeling back to Hank and his mistress, and she willingly submits to their perverted desires. Bellman, having been rejected by Mrs. Fletcher, returns, contrite, to Wendy. The two plan to escape the jaded atmosphere, but Hank and his mistress forcefully detain them