Kyo

There must be a reality in order for you to perceive it. Regardless of whether you see something as black, red, or green, the object you are looking at has some chemical/physical structure which causes it to be black to someone, red to someone else, and green to yet another person - each person percieves differently, but the reality does not change.

For instance - if I pick up a rock, it will be some specified weight, some texture, some shape. If a giant picks up the same rock, it will weigh much less to him. It will also feel much smoother, since the 'texture' that I felt was caused by bumps and ridges much smaller to the giant than to me. The shape will also be different to him, assuming that his visual resolution is proportional to his size in the same way that mine is proportional.

And if we throw the rocks at someone, the force of impact will be some function of the force of our throw.

Granted, we construct our own versions of reality based on our perceptions - that's all we can do. But our reality does not necessarily correspond to the absolute reality.