Man is Impatient Allah informs about man and his inclination to corrupt his behavior.

Allah says,

إِنَّ الإِنسَـنَ خُلِقَ هَلُوعاً

فَمَنِ ابْتَغَىٰ وَرَ‌اءَ ذَٰلِكَ فَأُولَـٰئِكَ هُمُ الْعَادُونَ (but the one who seeks [ sexual gratification ] beyond that, then such people are the transgressors...70:31). The preceding verse permitted to have sex with their wives and with slave-girls who are lawfully in their possession. The current verse prohibits sexual gratification beyond this limit. This verse also excludes women who, according to Shari'ah, fall within the prohibited degree. Similarly, Mut'ah (hiring a woman for a temporary period for the purpose of enjoying sex with her) is not a marriage according to Shari'ah, therefore, it is also included in the meaning of this verse.

Masturbation is Forbidden