a fart can be regarded as "aerosolized poop," which means that microscopic fragments and droplets of poop are actually distributed throughout the gaseous matrix of the fart. When delivered from the anus with some force, the components of the fart can penetrate one's clothing and these tiny particles can be trapped in the fibers of the cloth. The particles are transferred to your fingers and then your nose when you scratch and sniff.
__________________
|