Tourists who sit by the fire for a long time have clothes and things that smell of smoke. How can this be explained?

Things smell like smoke among tourists sitting around the fire for a long time. Here, a physical phenomenon is observed in which smoke molecules from a fire move and fall on the human body and the smell of smoke begins to soak clothes. This phenomenon is called diffusion – the forces of mutual attraction act between the molecules, they move randomly and in all directions, also the molecules of one substance are able to penetrate into the molecules of another substance.