I also noticed it the other day, that difference contrast can make. I was driving home from dropping off the kids at school, and appreciating the lovely hot air blowing from the car heater vents. Now, I would not have been nearly as grateful for that warmth if I hadn't been so cold just a few minutes earlier. Going from freezing to toasty has a way to make you appreciate the pleasure of a well-functioning heater. In the spring, we take the warmth for granted, don't even think of it; and then come summer, we get too much of it, and crank up the air conditioner - aah, coolth. The contrast has it.

My cats, though, do not appreciate contrasts. The strawberry tabby (he looks like a ginger tabby that's been run through the wash with too much bleach) likes to sit on the pink shale rocks which are the exact colour of his fur, and the small fluffy black one usually chooses to perch on the lap of the person who is wearing black jeans. Failing the Men in Black, she finds the nearest black backpack which was conveniently dropped on the floor where it doesn't belong. And snowy winters are the bane of her existence - not only is it horribly cold and wet outside, but that stark whiteness, it obviously offends her tender sensibilities. Black kitty and white snow do not mix.
Life, the Universe and Contrasts. I think I'll have some hot tea to celebrate the cold outside.