All the animals living in the Earth, no matter animals, plants and microorganism, have a common language - smell. Even the communication between people and other animals. For example, a dog will know that if you afraid of it or not. "Fear" can be smelt. Scent can also be communicated between people. Study shows that human can distinguish happiness, sadness, fear from the others through scent. And they even proposed that people like each other with the help of scent.
So I develop a device for people to reach out and get close to each other with the ability of smell.