It is news that should excite geeks - new research suggests maths can boost people's sex lives, even into their 80s.
Researchers at the International Longevity Centre UK found a link between the ability to perform mathematical tasks in later life and the likelihood of having sex.
Pensioners who can give the correct answer to a handful of moderately easy sums are twice as likely to be sexually active than those who struggled with the task.
The finding comes in a paper on financial literacy in old age, presented to a conference on pensions and retirement income.
Dr Cesira Urzi Brancati, a research fellow at ILC-UK, used data from the English Longitudinal Study of Ageing (ELSA), which has been charting thousands of over-50s for 14 years to test links between cognitive ability and financial nous.