In 1998, after testing positive for high levels of testosterone, the American sprinter Dennis Mitchell blamed the result on alcohol (five beers) and sex (four times the previous night). It was his wife’s birthday, he said. ‘The lady deserved a treat.’ After failing three drugs tests in 2009 and 2010, the Olympic gold medallist LaShawn Merritt attributed the result to a ‘product I used for personal reasons’: the penis-enhancement drug ExtenZe. The Belgian cyclist Björn Leukemans, suspended for doping in 2008, claimed that high levels of testosterone appeared in his urine because drug testers interrupted him having sex with his wife. Anti-doping officials said that no amount of sex could explain the levels of synthetic testosterone in his blood.