Gravity has always been thought of as an attractive force between two masses. Is there any reason for this view? just because the net result of gravity is that two masses attract each other, is this really all that is going on. About an hour ago an idea hit me, and thinking about it since then it seems to make more and more sense. could it not be that "gravity" as we see it is caused not by exchange of particles or a disturbance in space time but by a mass getting in the way of another force. There may be a constant force on all objects from all directions, which when out in space and free from any gravitational effects would cancel out. when this force (what ever it may be, a flux of virtual particles in my opinion) passes through a mass of atoms it loses energy. if this disturbed force is now observed out in space away from the mass which it passed through it will be a lower magnitude than the force from all other directions, the net result of this is that any object in this region of space will experiance a force toward the mass which disturbed the force. This may seem a needlessly complicated way to explain a simple effect but I would be interested to hear peoples opinions on it. you never know this might lead to a "better" theory of gravity, more in line with the other 3 forces, but i doubt it.