Answered by Ustadh Tabraze Azam
Question: Assalamu aleykum,
When waking up I always find a dry white stain on my underwear. How am I supposed to tell whether the white stain is sperm or pre-ejaculatory fluid?
Answer: Assalamu alaikum wa rahmatullahi wa barakatuh,
I pray that you are in the best of health and faith, insha’Allah.
You should make a judgement, and don’t investigate too much.
The basis would be that ejaculation would leave a noticeable or sizeable stain, and releasing pre-sexual fluid would not.
And Allah alone gives success.
Checked & Approved by Shaykh Faraz Rabbani