This sometimes happens: You dream you are amorously entangled with a woman not your wife. But you know you are dreaming, and you begin philosophizing within the dream about the moral propriety of enjoying the sexual intercourse in the dream. You ask yourself: Should I give my nocturnal permission to this nocturnal emission?
If I am not mistaken, St Augustine discusses this question somewhere in his vast corpus. But I forgot where.
Interesting to note that the permission and the emission occur, if they occur, in reality, not in the dream.