We all want to let our hair down on holiday . But some people are letting everything go, even their underwear.

Nude cruises – or ‘nakations at sea’ – are booming, as a growing number of travellers leave their inhibitions at home.

But, if you’re picturing a sweaty free-for-all on deck, or passengers hooking up left, right and centre, think again.

Travel company Bare Necessities has been taking passengers sans clothing on week-long cruises to the Caribbean and beyond since 1991. But cruise organiser for the company, Kat Whitmire, has revealed one major rule which only applies to men.

Erections onboard are strictly banned unless they’re in the comfort of their own cabin. ‘Men can’t be overly excited. We say that if they start to feel things around moving down there, jump in cold

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