Penny: I’m a Sagittarius, which probably tells you way more than you need to know.
Sheldon: Yes - it tells us that you participate in the mass cultural delusion that the sun’s apparent position relative to arbitrarily defined constellations at the time of your birth somehow affects your personality.
Sheldon: What’s the difference? In the winter, that seat is close enough to the radiator to remain warm and yet not so close as to cause perspiration. In the summer, it’s directly in the path of a cross-breeze created by opening windows there and there. It faces the television at an angle that is neither direct, thus discouraging conversation or so far wide to create a parallax distortion. I could go on, but I think I’ve made my point.