How can one distinguish between continuous yellowish discharge and semen, especially upon waking up and seeing something resembling a wet dream? Is it permissible to differentiate between them by smell? And does the ruling on turbidity (Kudra) differ from that on yellowish discharge (Sufra)?

Among the signs of a woman's maniy (seminal fluid) is its scent, which resembles the smell of dough or date palm pollen. It can be distinguished by its smell, and differentiating it thereby is correct. If you are uncertain about what has exited, you may choose and assign it the ruling you wish. The yellowish and brownish discharges (ṣufra and kudra) are impure (najis) and share the same ruling. We have already explained when they are considered menstruation.