Our skin can be personal sensors for temperature, touch and so on. Bio-personal thermometer, which is made of the piece of human skin, is new kind of products by clone technology. Providing people with new experiences of products using cloning technology. How do living objects' behaviours influence people? These behaviours are the most intuitive interactions, yet there are some emotional elements as well. This project is conceptual and imaginative. A living sensor has the most primitive behaviour that can be understood immediately by people. By fitting cloning technology into products, living human or animal skin for example, can become intuitive sensors. These sensors not only communicate visually, they also give some feeling of emotion because they are living. By using your own skin, you can have your own personal sensor. They can act as memento objects by using your pet's skin or your lover's skin.