Thinking of buying a TV for the bedroom? Think again - it could ruin your sex life.

A study by an Italian sexologist has found that couples who have a TV set in their bedroom have sex half as often as those who don’t.

“If there’s no television in the bedroom, the frequency (of sexual intercourse) doubles,” said Serenella Salomoni whose team of psychologists questioned 523 Italian couples to see what effect television had on their sex lives.

On average, Italians who live without TV in the bedroom have sex twice a week, or eight times a month. This drops to an average of four times a month for those with a TV, the study found.

For the over-50s the effect is even more marked, with the average of seven couplings a month falling to just 1.5 times.

The study found certain programmes are far more likely to impede passion than others. Violent films will put a stop to sexual relations for half of all couples, while reality shows stem passion for a third of couples.