In Brazil, an agency named Master has invented a device called sex thermometer which will tell you whether you are in the right mood for sex. You just have to place your hands at the device.
This non-scientific device has been created with a noble aim of encouraging the people to use condoms. When someone places his hands on the heat sensor, it will change colour according to his body temperature. If the sensor shows blue color it means that your body is heating up. Green means you are in the mood for sex. Red means you are too hot at this moment and it is time to find a room. And, if the sensor doesnât show any colors, it means that you are still just warm.