According to that paragon of virtue, the London Lite:
Almost 80 per cent of Britons prefer a good night's sleep to sex. In a study of more than 8,500 people, 79.2 per cent said they preferred the thought of some extra shut-eye. Only 12 per cent said they got eight hours' sleep although 40 per cent believed that was how much they needed.
Didn't anyone say they would prefer sex and sleep? I can't usually sleep much, except after sex!