LUCKY for some!
It seems that people who have had 13 former sexual partners make the best lovers.
Any fewer, and their lack of experience is likely to lead to an awkward fumble, while any more suggests they see each conquest as just another notch on the bedpost.
In a survey of 1,000 men and 1,000 women, 52 per cent felt 13 former flames was the ideal number, while 73 per cent said someone with 18 or more was a turn-off because it made them feel like just an addition to the list.
And men are more likely to sleep with someone on a first date, with 77 per cent saying they would, compared to just 39 per cent of women.
The survey was carried out by illicitencounters.com, which describes itself as a dating website for married people.
Its spokeswoman Jessica Leoni said: “A high number of sexual partners is a turn-off for many.
"Nobody wants to be just another notch on the bedpost.
“Equally, we don’t want to date somebody who has barely had any experience — it’s a recipe for an awkward fumble.
“Thirteen is the ideal number and guarantees somebody will be experienced, adventurous and open-minded between the sheets.”
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Researchers also found 70 per cent of men and women lie about their number of exes.
Men are more fussy than women, with 59 per cent saying a high number of sexual partners makes them less desirable, compared to 46 per cent of women.
And only 31 per cent of people said they wanted to know about a new partner’s previous love life.