My friends keep (strongly) implying that gravity is not a characteristic of mass, though I cannot think of nor find any incidence where gravity exists without it. If this is the case then does that not suggest that the planets/stars/moons etc. did not form by smaller masses colliding together to create a larger mass which attracted more mass which eventually formed a planet/star etc. but that gravity existed in these places already and the mass equivalent to the gravitational pull of that (I don't think there's a term for it sooo, G-ball) G-ball was pulled there?
Please try to explain with as little reference to advanced mathematics as possible as I never got much further than long division XP. Consider it anexercise in explaining General relativity to the masses XD.