Invented by a Tipperary man, the Gaydar (right) looks just like a car alarm remote control and slips easily into your pocket. But every time you come within eight metres of another Gaydar owner, it starts to vibrate, telling you that you are near another person who is both gay and available.

The Gaydar, around £29 (€37), is available from The Inventor's Club, tel 00 44 1737 277387.