It also applies to unclean activities practiced by an individual in private, such as reading sexually stimulating books or viewing pornography, which may lead to the unclean habit of masturbation. ​ — Col. 3: 5.
وَذٰلِكَ قَدْ يَدْفَعُهُ إِلَى مُمَارَسَةٍ نَجِسَةٍ أُخْرَى هِيَ ٱلْعَادَةُ ٱلسِّرِّيَّةُ .‏ —‏ كو ٣ :‏ ٥‏ .‏