More than half of women avoid having sex with their partners because of their extra weight, according to a UK survey.
In the study, some 52% said their lack of confidence in the shape of their bodies made them reluctant to be intimate, reports the Daily Mail.
Even more blamed tiredness for killing off the prospect of a night of passion.
Experts said the Sex In The Nation poll showed many women were suffering from a combination of unrealistic expectations about their appearance and increasingly busy lives, and warned relationships were inevitably suffering as a result.
The survey of 4,000 people found that 29% of women cited feeling that they looked fat as a reason for avoiding sex, with a further 23% blaming embarrassment about their 'wobbly bits'.
The biggest passion-killer of all was tiredness, a reason 72% of women said they had given their partners, followed by feeling unattractive (34%), illness (33%) and stress (32%).
Psychosexual specialist Dr Catherine Hood, who lectures at Oxford University, said many women 'feel under pressure to live up to a vision of perfection, which just isn't realistic'.
The survey was commissioned by Fembido, a 'passion pill' made from a blend of herbal ingredients, which claims to boost the female libido.
