Two relatively massive objects in space separated by a large distance interact with each other through gravity. If they are relatively small and separate by a large distance, the effect of gravity becomes negligible. If they are relatively small and put close to each other (pressed against), gravity is negligible and it is the electrostatic force that comes into play. At short range, the repulsive electrostatic forces are extremely strong. In fact, it is the extreme strength of the electrostatic force that allows you to overcome the large gravity of our Earth, stand on the ground and jump; otherwise one would just sink. Dirt sticks to your shoes and can overcome the gravity of mighty Earth, for the same reason.