Gravity is a force that attracts smaller bodies to larger ones more than the other way around.
Two bodies will collide when they come into contact with each other. If they are moving slowly relative to each other, the collision will be gentle. If the bodies are elastic, they will temporarily deform to absorb the impact's energy and then return to their original shape. However, if the relative velocity is high or the bodies are brittle, the impact will be violent and potentially destructive.
Moreover, if the bodies are different in size, the smaller body will suffer the worst impact.
How is gravity different from human attraction?
Hard to say.