In the seventh episode of Doctor Climax, titled "Sadism Masochism," the series continues its exploration of the complexities of human sexuality and the impact of societal norms on individual desires. This episode is a deep dive into the world of sexual preferences and the challenges faced by those who seek to understand and express their true selves.

The episode opens with a flashback to the life of Nat's parents, revealing that his father is gay and has been living separately from the family after coming out to his wife. This revelation sets the stage for a deeper understanding of Nat's own struggles with his identity and his role as Doctor Climax. The episode also introduces a new character, a woman whose husband is going through the same realization, questioning the heritability of homosexuality. However, Doctor Climax is nowhere to be found, and Bangkok Express is forced to temporarily stop the column. Linda, too, is missing in action.
Nat's internal conflict intensifies as he locks himself in his clinic, blaming himself for the events surrounding Sangjaan. Meanwhile, Linda drowns her sorrows in alcohol and has a one-night stand with a casual friend, Muek. This marks a significant departure from her usual reserved demeanor and highlights the emotional turmoil she is experiencing.
Tukta, on the other hand, continues her affair with a new man who gives her a butterfly ring as a symbol of freedom. This gesture prompts Tukta to reconnect with her old high school boyfriend, Tong, signaling her own journey towards self-discovery and empowerment.
The episode takes a significant turn when Nat visits his estranged father and his boyfriend, Pan. This reunion is a pivotal moment for Nat, as he gains a new perspective on his parents' relationship and his father's struggles. His father's encouragement to live life fully and the acknowledgment of Nat's role as Doctor Climax provide him with the clarity he needs to move forward.
Nat's visit to Sangjaan in jail is another emotional high point. He apologizes for not responding to Sangjaan's letter sooner and offers advice to hold on and persevere. This exchange is filled with hope and accountability, showcasing Nat's growth as a character and his commitment to advocating for minority rights.
The episode also explores Tien's journey as he grapples with his own sexual performance issues. His encounter with Plern and their subsequent sexual encounter at the sex club is a testament to his desire to overcome his insecurities and embrace his sexuality.
However, the episode ends on a cliffhanger with Linda discovering her pregnancy. The question of who the father is left unanswered, adding another layer of complexity to the already tangled web of relationships within the series.
"Sadism Masochism" is a powerful episode that delves into the shadows of desire and the societal pressures that shape our understanding of sexuality. It is a poignant exploration of the human condition and the lengths we are willing to go to find acceptance and understanding in a world that often shuns those who dare to be different. Doctor Climax continues to push the boundaries of storytelling, offering a compelling narrative that is both thought-provoking and emotionally resonant.