Two is day and night, male and female, yang and yin, light and dark, right and wrong, right and left. We have two hands, two feet, two eyes, two lungs, two kidneys, and two ovaries. This anatomical symmetry is deceptive when reflected. Gravity bends time and space. Like light, time is made up of particles.
Particles have mass.
Mass has weight. Time has weight and therefore velocity. That's why the older you get, the faster time progresses. But I digress from my discussion of the symmetrical properties of the number two. Human symmetry, though more than skin deep, is not total.