Masaail relating to intimacy

Q: Is it wrong to have a high sex drive? I love having frequint sex with my wife. Sometimes I want sex for one time 3 nights in a row or very seldom twice in one night and sumtimes once every second night. Mostly we have sex once every third to fourth night. She complains and has a problem with this because she doesn't want to wet her hair so often and its frustrates me if she refuses or when she finds a problem with this. Is this normal to feel frustrated what is the ruling about the amount of sex I can have with my wife?

Q: We are a relatively young couple and happily married with two children. One thing missing in our marriage is intimacy and sex. Its been like this for
the last 9 years. My wife has declared that she is no longer interested in this side of marriage and wants to be left alone. Sexual frustration and being faithful has been a huge battle and test so far and to keep this in check would occasional masturbation be allowed?

Q: Can I see my wifes body? Is it allowed to have bath at the same time in the bathroom?

Q: Is it permissible for a husband and wife to not have their satar completely covered for each other in the privacy of their home or bedroom? For example the wife dresses up for her husband at home and in doing so maybe part of her satar is not covered and vice versa man does for his wife?