While it is true that atoms are composed of charged particles (protons and electrons) and possess magnetic properties, the magnetic forces at the atomic level are generally much weaker compared to other fundamental forces, such as electrostatic forces.
The reason we don't typically observe humans attracting iron-made things like magnets do is due to several factors:
Magnetic strength: The atoms in our bodies, such as those in our cells and tissues, do possess magnetic properties, but they are not strongly magnetic like iron or other ferromagnetic materials. The magnetic fields produced by the individual atoms cancel each other out, resulting in a negligible net magnetic effect.
Alignment of magnetic moments: In ferromagnetic materials like iron, the magnetic moments of the atoms are aligned in a cooperative manner, leading to a macroscopic magnetic field. In contrast, the magnetic moments of atoms in our bodies are not aligned in the same way, and the overall magnetic field produced is extremely weak.
Distance and shielding: The magnetic force between two objects decreases rapidly with distance. The atoms in our bodies are separated by a significant distance, and the weak magnetic forces they generate are not enough to overcome the other forces acting on a macroscopic scale. Additionally, the human body, being mostly composed of non-magnetic materials, acts as a shield against external magnetic fields.
In summary, while humans and all matter are made up of atoms with magnetic properties, the overall magnetic effect at the human scale is extremely weak, and it is insufficient to produce noticeable attraction to iron-made things.