Dreams
Sometimes dreams are simply dreams. During his lifetime, he'd had a lot. For instance, when he was kid, he dreamed about being an astronaut like Neil Armstrong, jump on the moon, probably give a party up there and invite all the Martians to join it. Obviously, he was an idiot back then, but he was a happy idiot - sometimes he missed the fun that was being a kid. But childhood vanished too quickly and he found himself growing up faster than most men. And with childhood's death arrived adolescence - those days in which wet-dreams populated his horny teenager mind. But they were just dreams, too good and pleasurable to be true. What he hated was the other sort of dream, the ones that seem so real and palpable and nasty - because dreams that look real can never be good. When he lied in that bed with her at his side again, he should've known he was dreaming and not awake.