New girlfriend says masturbation can cause prostate cancer. Is this true?

No link demonstrated. Much concern over a small, case-controlled study reported in january 2009 issue of bju international which reported increased rate of prostate cancer for men in 20's and 30's who masturbated 2-7x/week (and a lower rate for men in their 50's who masturbated often). There are many reasons not to believe the reported conclusions, and it has not been confirmed in other studies.
She's wrong. I'm sorry that she's misinformed. It has no adverse health consequences so long as it's not part of an obsession with erotica that's robbing you of full participation in life.
Not clear. A study showed th masturbation during men's 20s and 30s increased their risk of prostate cancer.For men in their 20s, "frequent masturbation" - 2-7x/week. Compared to same-age men who reported masturbating less than once per month, 20-something frequent masturbators had a 79% higher risk of prostate cancer by age 60."but men in their 50s who masturbated frequently had lower risk of prostate ca.