Dutch council officials will permit gay sex in public areas but fine dog owners who let their pets off the leash in Amsterdam's Vondelpark.

Paul van Grieken, an Alderman in the Oud-Zuid district of the city, has startled many Amsterdammers, despite their famously liberal attitudes, with plans to allow public sex as part of this summer's new rules of conduct for the country's best-known park.

"Why should we try to impose something that is actually impossible to impose, which also causes little bother for others and for a certain group actually means much pleasure?", he said.

Amsterdam's beautiful Vondelpark in the centre of city draws hordes of summer visitors, families, skaters and joggers.

But the park's rose garden has become famous as a trysting spot for gay men looking for uncomplicated sexual encounters.

Mr van Grieken stresses that tolerance to "cruising" gays, aimed at protecting homosexuals from violence, will have "strict rules attached".

"Thus, condoms must always be cleared away, it must never take place in the neighbourhood of children's playgrounds and the sex must be restricted to the evening and night-time," he said.

The new park rules have the blessing of the Dutch police, who have urged all Dutch parks to follow Amsterdam's lead.

But Amsterdam's dog owners are less impressed. The new park code of conduct will set out stiff fines for dogs that are allowed to run around the Vondelpark off the leash.

"Research showed that many people find this disturbing," said Mr van Grieken.

One dog owner protested: "As long as the park has existed, we've been allowed to let our dogs run freely. It's outrageous that we will be punished from now on but public sex won't. If they can drop their trousers, why can't I let my dog loose?"

(Perhaps because gay men with their trousers dropped might be shocked to suddenly feel a cold, wet nose where it doesn't belong. On the other hand, dogs like licking balls...)