almost as good as most good s*x

"Among the many exhilarating things Lake taught was that the order of the solar spectrum is not a closed circle but a spiral of tints from cadmium red and orange through a strontian yellow and a pale paradisal green to cobalt blue and violets, at which point the sequence does not grade into red again but passes into another spiral, which starts with a kind of lavender gray and goes on to Cinderella shades transcending human perception".

(Nabokov, Pnin)