SINGAPORE, April 24 (Reuters) - Gentlemen please, rate yourselves: are you a cucumber or a banana in bed?

Singapore's Society for Men's Health and a pharmaceutical firm are proposing a four-point scale for erectile dysfunction, allowing men to rate their own hardness with four categories: cucumber, unpeeled banana, peeled banana and tofu (bean curd).

"Men should aim for this," UK sex therapist Victoria Lehmann told a news conference, holding a cucumber.

The scale does not involve any scientific measurement -- patients would merely be asked to assess their own levels of hardness -- and has not been accepted by any medical authorities.

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