The lights were off so that his heads could avoid looking at each other, because neither of them was currently a particularly engaging sight, and nor had they been since he had made the error of looking into his soul.
It had indeed been an error. It had been late one night – of course. It had been a difficult day – of course. There had been soulful music playing on the ship’s sound system – of course. And he had, of course, been slightly drunk.
In other words, all the usual conditions which bring on a bout of soul-searching had applied, but it had, nevertheless, clearly been an error.