You may not know that there are alternative theories of atoms. Irish author Flann O'Brien thinks that cyclists are made up of atoms that look just like themselves from their helmets to their cycling shorts, to their shaved legs. He said that bicycles are similarly composed of atoms that look just like little bikes, from the saddle, to the handlebars, to the wheels, to the bell.
Now here's the tricky bit.
When somebody rides a great deal the atoms tend to become mixed and a bike may have 5% or 10% or even more of the cyclist's atoms, while he might have an equivalent number of bicycle atoms. In extreme cases bicycles with lots of human atoms have been found indoors warming themselves by the fire, while their riders may sometimes go to sleep leaning against a wall.