The Messenger of Allah said: "Four are from the Sunan of the Messengers: Al-Hayat, using Atar, the Siwak, and marriage."  

رَسُولُ اللَّهِ ﷺ أَرْبَعٌ مِنْ سُنَنِ الْمُرْسَلِينَ الْحَيَاءُ وَالتَّعَطُّرُ وَالسِّوَاكُ وَالنِّكَاحُ قَالَ وَفِي الْبَابِ عَنْ عُثْمَانَ وَثَوْبَانَ وَابْنِ مَسْعُودٍ وَعَائِشَةَ وَعَبْدِ اللَّهِ بْنِ عَمْرٍو وَأَبِي نَجِيحٍ وَجَابِرٍ وَعَكَّافٍ  

"We went with Messenger of Allah, while we were young men who had nothing. He said: 'O young men! You should marry, for indeed it helps in lowering the gaze and protecting the private parts. Whoever among you is not able to marry, then let him fast, for indeed fasting will diminish his sexual desire."  

خَرَجْنَا مَعَ النَّبِيِّ ﷺ وَنَحْنُ شَبَابٌ لاَ نَقْدِرُ عَلَى شَيْءٍ فَقَالَ يَا مَعْشَرَ الشَّبَابِ عَلَيْكُمْ بِالْبَاءَةِ فَإِنَّهُ أَغَضُّ لِلْبَصَرِ وَأَحْصَنُ لِلْفَرْجِ فَمَنْ لَمْ يَسْتَطِعْ مِنْكُمُ الْبَاءَةَ فَعَلَيْهِ بِالصَّوْمِ فَإِنَّ الصَّوْمَ لَهُ وِجَاءٌ