Why does husband still wants to do sx every night after 9 months of being married?

Your parents didn't learn about his lifestyle enough before they arranged your marriage. If you are from a culture that still arranges marriages, there are also taboos that unfortunately they will not hold against him but against you. Do not do anything you are not comfortable with. Arranged or not before you have sexual intercourse your husband is supposed to make you comfortable enough to enjoy relations with him. You are not a prostitute. Ignore what the fools above had to say - this isn't about ending sexual relations once you are married. Obviously you were a virgin and did not know what to expect other than what your mother told you. You are a grown woman now. Become wiser and hold your ground. Ask for help and advice from your doctor. I suggest you make an appointment and tell her about the practices your husband asks for and what the risks to your body are. Educating yourself is the key to protecting yourself. God be with you.