REUTERS - Mar 24 - Smell Dating is a New York matchmaking service that promises to help single people sniff out their perfect match by breathing in the odors from dirty T-shirts. The idea is based on the science of pheromones. The founders describe it as an art project. Each of its first 100 clients received a T-shirt to wear for three days straight without bathing. The clients then mailed the T-shirts back to be cut into swatches. Smell Dating then sent batches of 10 mixed swatches back to the clients to sniff.