Almost half a million new cases of sexually transmitted infections were diagnosed in 2012, according to figures from Public Health England.
There were 448,422 new cases - a rise of five per cent on the previous year. There were 206,912 new cases of chlamydia. Diagnoses of gonorrhoea were up 21 per cent.
The impact of sexually transmitted diseases was greatest on young people under 25.
(Among men who have sex with men, there was a 37 per cent increase in new cases of gonorrhoea, an eight per cent increase in chlamydia and an eight per cent increase in genital warts.)
Peter Saunders claims to have the remedy. Marry a virgin, he suggests, and stay faithful to him or her throughout your lifetime.
It is, he says, amazingly effective.