Evidence directly refutes the claim that a lack of ejaculation causes prostate cancer; instead, large cohort studies and meta-analyses consistently show that higher ejaculation frequency is associated with a reduced risk of the disease.
The retrieved literature (including large prospective cohorts like [0], clinical studies like [10], and comprehensive meta-analyses like [11]) consistently demonstrates an inverse relationship between ejaculation frequency and prostate cancer risk. Higher frequency is associated with a protective or lower risk effect, which directly contradicts the claim that a lack of ejaculation causes prostate cancer.