What is the ruling concerning the discharge that a non-married girl experiences when thinking about the future and marriage, what is it, and does it affect the validity of prayer, given her inability to differentiate between various discharges?

The fluid that is discharged due to lust is of two types: one is often madhy (pre-seminal fluid), and in this case, ghusl (definition) (ritual bath) is not obligatory. Rather, wudu (ablution) and washing what it has touched suffice. To overcome lustful thoughts, it is recommended to remember Allah, recite the Qur'an, choose righteous company, occupy one's time with beneficial activities, and increase fasting to discipline lust.