It's same data of men who suddenly develop lung cancer after their first month of smoking. Doesn't mean it won't come back and bite you in the long term.

"In all, men who averaged 4.6–7 ejaculations a week were 36% less likely to be diagnosed with prostate cancer before the age of 70 than men who ejaculated less than 2.3 times a week on average."

- a havard article, based on an australian study.