A submission by Dr. Abasi suggesting that women who have more sex may have a lower risk of breast cancer has drawn attention, but the claim requires careful interpretation.
Speaking on women’s reproductive health, Dr. Abasi argued that sexual activity, particularly when it results in orgasm, could have beneficial effects on a woman’s health. He linked orgasm to the release of oxytocin and suggested that the hormone could potentially reduce the risk of breast cancer.
He also used the discussion to challenge the tendency of society to blame women for infertility, stressing that infertility can involve both male and female factors. 
“It’s unfair that our society blames infertility on women,” he said, maintaining that responsibility for infertility should not automatically be placed on women.
However, the suggestion that more sex directly protects women against breast cancer is not established medical fact. While sexual activity and orgasm cause temporary hormonal and physiological changes, there is no established recommendation from major cancer-health authorities that women should have more sex as a breast-cancer prevention strategy.
Breast-cancer risk is influenced by several factors, including age, family history and inherited genetic mutations, reproductive and hormonal factors, alcohol consumption, body weight and physical activity. Some risk factors cannot be changed, while others can be modified through lifestyle choices.
Dr. Abasi also touched on childbearing and reproductive health, suggesting that women who have never had children may face increased risks of some reproductive cancers.
Medical evidence does show that reproductive history can influence breast-cancer risk, but this should not be interpreted to mean that women must have children—or have sex—to protect themselves from cancer.
For women, established preventive measures include maintaining a healthy weight, engaging in regular physical activity, limiting alcohol consumption, avoiding tobacco, knowing one’s family history and following age- and risk-appropriate breast-cancer screening recommendations.
The discussion therefore highlights an important distinction between a biological hypothesis and proven cancer prevention.
While sex and orgasm may have physical and psychological benefits, there is currently insufficient evidence to tell women that having more sex—or reaching orgasm—is a proven way to prevent breast cancer.
