The campaign seems to be mainly a psychological one and not a step on the path towards taking health seriously. The figures do not justify the campaign or its cost. A localised campaign in Glasgow bears this view out. It had no effect whatsoever on the numbers of cancers found, but did a lot to boost the numbers of healthy men who became worried about their balls, visiting their GPs and wasting everybody's time. We are not talking about prevention.
Nobody knows exactly what causes testicular cancer.
Some argue it is mainly genetic, others say it is hormonal and still more are inclined to suggest that it is environmental. The wise ones say that it is probably a mix of all three. Other, more specific and probably more absurd reasons have been put forward. Over the years sexual activity, a variety of traumas, mumps, orchitis and even temperature variations have all been blamed. Even watching TV and riding motorbikes can result, apparently, in radioactive emissions affecting the testes.