Apparently orgasm is the only point where your mind becomes completely empty - you think of nothing for that second. That's why it's so compelling - it's a tiny taste of death. Your mind is void - you have nothing in your head save white light.
Madness string 81293
As my uncle Braceforth used to say, 'There are very few problems that cannot be made better with a night's sleep, breakfast, and a pickaxe.' He never went more than two miles from the warren in his life, but the principle still holds.