The global obesity crisis is beginning to interfere with our sex lives, according to a new study.

But the figures from Reader's Digest suggest that some nations are more concerned than others. More than half (52%) of those in Australia and Mexico say that excess weight holds them back from having a good time in the sack, slightly more than the 51% who say the same in Russia.

In Hungary, by contrast, only 15% highlight weight as a potential problem in bed. The Dutch are similarly unaffected, with just 18% complaining. In the US, more than half (51%) of married women wish their husband was thinner. A similar number of men (47%) wish the same of their wife.

Interestingly, though, a recent survey from Male Edge revealed that weight is not the be-all and end-all: 72% of the women polled said they would rather have a man with an average body and a large penis than a guy with a fantastic body but a small penis!