University boffins have worked out a formula to find a person's sexiest time of day.
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The complex equation, AL/T + 10 x AG / SF x G = TOTAL / 60 = ST, reveals the time of day a person is best primed for sex.
The sum takes in the gender of the person, the number of units of alcohol consumed in a week, the number of sex sessions and the preferred time of day for a romp into account.
Academics at the University of Cardiff teamed up with Mates Intensify to come up with the mathematical formula in time for Valentine's Day.
Visit matesintensify.co.uk to work out your sexiest time of day.