There were many headless Buddhas located at this wat - Wat Mahathat. Some tourists might find it amusing to put their heads on the Buddha's body but this is not allowed. You are also not allowed to step on the Stupas where the Buddha(s) are located or even take pictures above Buddha's head. If you fail to comply esp putting your head on the headless body, your camera will be confiscated. One should respect other people's culture and belief. Make sure you follow the rules. It's really sad that the heads are being taken away and put in Museums or even sold and decorated in houses or for comercial purposes. Visiting the place and seeing these headless Buddhas is very sad. Just imagine someone chopped off your head and used it as a decorative piece!