Here is a guide to the places where not to have your celebratory millennial bunk-up. The Mile-High ClubAt 00.00 on New Year's Day the chip in the smoke alarm in the aircraft lavatory will fail, causing it to go off and alert the cabin staff to the less serious but still illegal act you are performing within. Of course, the flight attendant may be too busy to attend to the matter as the plane will already have gone into freefall through computer error at air traffic control. As a sexual turn-on, this would be suitable only for those who thought the film Crash was a bit horny and who wondered if air disaster victims might really do it for them. However, if you want to take the risk, I'm sure those "See in the New Year in Five Different Time Zones" Concorde trips will be going cheap this year.In the liftAs the date flips over to 00.01, one of two things will occur. One possibility is that the lift will immediately go into freefall, giving you an exhilarating but tantalisingly short taste of zero gravity sex, before impacting in the basement and providing the two of you with a permanent experience of mutual necrophilia. Alternatively, the lift may decide the date is 1900 and, finding no record of having been serviced, will sink to the basement and close down, trapping you inside until the engineer arrives. As he has probably been lynched by a rampaging food mob or taken out by a rogue Chinese nuclear missile strike, this could be a long wait.The photocopy machineThis machine will also cease functioning, causing disappointment for those making out on top of it and wishing to make souvenir Xeroxes of their bottoms at the same time.Inside an office buildingAny building whose doors are opened by electronic swipe cards will automatically seal all exits and internal doors.

Thus, if you are copulating on such premises, you will find yourself incarcerated. The problem of gradually dying of starvation over the course of the coming weeks will be nothing in comparison with being left face-to-face with the inappropriate person you performed drunken sex with, just as your hangovers start to bite.In a public superlooWhen the embedded microchip fails, the loo door may open to reveal your nakedness to the masses outside, which won't matter as by this time they will all be otherwise occupied looting shops and setting fire to buildings. A worse scenario is that you will be permanently locked inside the lavvy with the likelihood being that it will decide it has not been disinfected for a century and promptly flush itself out with scalding-hot Dettol.In the back seat of a carFirst the car alarm will go off, alerting passers-by to what the steamed- up windows had only hinted at. The airbags may also trigger, so make sure you're doing it on the back seat.

Unfortunately, as all the car's electronics cease working simultaneously, the central locking system will fail, thus trapping you in the car.In the back of a taxiConversely, this is actually rather a good place for your celebratory coupling, assuming of course that you are able to find a taxi in the early hours of New Year's morning 2000. The electronic meter will break down at midnight so the driver will theoretically be unable to enforce any payment for the trip (let alone his bumped-up, customary New Year's Eve quadruple fare).Security video camerasGood news here too. All of these will fail on the stroke of midnight, thus preventing the security guard at your office blackmailing you with taped evidence of your indiscretion. Normally, of course, the problem is that not only is your drunken sexual incompetence lovingly photographed, but, thanks to the time code on the picture, the embarrassing brevity of your performance in milliseconds is also recorded for posterity.Condom vending machinesThere seems to be no consensus on what will happen to these potentially crucial Y2K sex facilitators.