And sexual activity tails off even further for 40 to 49-year-olds who have half the amount of sex of their 20-something counterparts, making love 69 times a year.

Some 38.8 per cent of 55 to 64-year-olds said they had lacked interest in sex for at least the last three months.

The figure was only slightly lower for the 45 to 54 age group, of whom 37.9 per cent had lost interest.

But men who had children were no less happy with their love lives.

Survey participants were asked whether they had lacked interest in sex for the last three months or more.

For women, having had three or more partners in a year was linked to a decline in libido alongside having children under five.

Having sex at least once a week slows aging in women - even if they do not enjoy being intimate, research found in July.

Relationship experts say couples should make time for each other and try to be intimate, even if they do not feel like sex straight away.

It said: "Do you want to go to lunch and a movie tomorrow? She'll pay." Watching Amy Webb's TED talk (in which she details her online dating frustrations‚éĮuntil she got all her algorithms right), I was reminded of my own internet adventures before finally meeting my husband on Match in 2006. Calculating debt based on who had caramel in their frappuccino is not. Approaching in the bright orange jacket I'd "borrowed" from a costume shop, I sported a hippy-fringe purse. Chris felt it too, awkwardly standing there in his loafers, pressed slacks, and white oxford.

The survey showed that both men and women were at risk of being put off sex by past experiences of forced sex.

Other passion-killers included poor mental and physical health or having recently had a sexually transmitted infection.

However, the survey suggested women become more content with their sex lives as they get older.