He’s got a point. There is no data supporting testicular self exams. He rants on:

Baum says the constant imploring of men to check themselves for testicular cancer, or to submit to prostate specific antigen tests (PSAs) for signs of prostate cancer, really is potentially harmful. ‘To promote testicular self-examination without evidence…well, it suggests we are not learning from the mistakes of the past’, he says. ‘There are actually no data to support the idea that detecting testicular cancer by self-examination improves on the mortality for testicular cancer; that is just an assumption, but there is no evidence to support that assumption.’