Voulez vous coucher avec moi ce soir? The wrong answer to that question has cost one Frenchman more than $13,000.

The 51-year-old man has been successfully sued by his ex-wife, who claimed he did not have sex with her enough during 21 years of marriage.

The couple, who raised two children in the French Riviera, were granted divorce in Nice, southern France, two years ago, with the wife blaming her husband's low libido for the split.

The divorce court ruled the husband, known only as Jean-Louis B, was "solely responsible" for the break-up.

London's Telegraph reported the 47-year-old woman recently took the matter back to court to seek €10,000 in damages for the inactive sex life.