What is the ruling on listening to calm music devoid of singing? What are the manners of marriage in Islam? And what is the ruling on a woman practicing masturbation out of necessity if her husband is facing incurable problems and divorce is not a solution?

Listening to music is not permissible, even if it is without singing.

As for the etiquettes of marriage, they include:

1. That the Muslim's intention for marriage be chastity.

2. That he choose a religious wife.

3. Showing gentleness to the wife when consummating the marriage.

4. That the husband says, upon entering with his wife: "O Allah, I ask You for her good and the good of what You have instilled in her, and I seek refuge in You from her evil and the evil of what You have instilled in her."

5. It is recommended for the couple to pray two rak'ahs.

As for masturbation, it is not permissible unless it becomes the only way to prevent falling into adultery.