Lisa del Giocondo, the model for Leonardo’s painting, was recorded buying snail water – then considered a cure for the STD. It could be the secret to a painting haunted by the spectre of death
Study finds that adults who wax, shave or pluck are twice as likely to get an infection because of cuts – but there are other possible explanations for the link
Dr Nicole Prause is challenging bias against sexual research to unravel apparent discrepancies between physical signs and what women said they experienced