7:37pm on Sat night means SEX hour!

The survey indicates that very few of us act spontaneously when it comes to sex, which could explain the three hour gap between arousal and sexual activity. Around half the couples surveyed admitted that they were so busy that they had to schedule sex in their diary.

However Richard Longhurst, co-founder of Lovehoney, doesn't think that scheduling sex is such a bad idea.

'Scheduling sex can seem like the least romantic activity in the world, but we have found that regular physical intimacy is the key to overall relationship happiness. 'If the only way you have time for sex is to schedule it, then why not?'