al-Mandhir bin Ya'la al-Thauri منذر بن يعلى الثوري · The Book of Purification

"I felt too shy to ask the Messenger of Allah (ﷺ) about prostatic fluid because of Fatimah, so I told Al-Miqdad bin Al-Aswad to ask about it, and he (the Prophet (ﷺ)) said: 'Perform Wudu' for that.'"