I used to get the emotional urethral discharge frequently so I requested Al-Miqdad to ask the Prophet ﷺ about it. Al-Miqdad asked him and he replied, "One has to perform ablution (after it)." (See Hadith No. 269).  

كُنْتُ رَجُلاً مَذَّاءً فَأَمَرْتُ الْمِقْدَادَ أَنْ يَسْأَلَ النَّبِيَّ ﷺ فَسَأَلَهُ فَقَالَ فِيهِ الْوُضُوءُ