The best way to keep a marriage happy is to sleep in the nude, a study suggests.

Those who wear nothing in bed are more content in their relationships than those who cover up, according to a poll.

Of 1,004 Britons, 57 per cent of those who sleep in the nude said they were happy in their relationships, compared with 48 per cent of those in pyjamas, 43 per cent of nightie wearers and 38 per cent of those in onesies.