cvc, thanks for pointing this out. I note that it's a British study. So maybe it only applies to Brits!
But seriously, they did not say that sex causes prostate cancer. Rather, the two occur together--men who had a lot of sex were more likely to have prostate cancer. The suggested reason was that men with high sex drives probably had high hormone levels, which might contribute to pc.
Previously, someone else here pointed out a study that linked pc to acne. Which is also linked to hormone levels.
Diagnosis at age 53. PSA 2007 about
2; PSA 2008 4.3
Biopsy September 2008: 6 of 12 cores positive; Gleason 4+3 = 7
CT and Bone scan negative
Da Vinci surgery at City of Hope December 8, 2008
Radical prostatectomy and lymph node dissection
Catheter out on 7th day, replaced on 8th day, out again 14th day following negative cystogram
Pathology: pT2c; lymph nodes negative; margins involved; 41 grams, 8% involved by tumor; same Gleason 4+3=7
PSA 1/22/08 non-detectable! 8-)