Author says it's rare togt through this life without feeling, generally, with a degree of secret agony. Human sexuality remains really very challenging in some of the things that it drives us towards. Hee, so somebody who is maybe very ratic, committed to galetarianism, may want to enslave some one and treat them extremely badly in a sexual scenario. This could sit so oddly with their commitments that they literally think they've been visited by a kind of madness.