Is obscene talk to increase lust during intercourse forbidden, even if it is imaginary or between those who engage in illicit intercourse?

It is permissible for spouses to exchange words that increase desire or otherwise, as long as it adheres to the parameters of Islamic law. Jurists have stipulated the permissibility of speaking between spouses during intercourse, excluding the mention of Allah, though it is preferable to refrain from it. Imam Malik disliked lewd talk and grunting during intercourse because it was not the practice of the righteous predecessors.