Nikaah & Marriage Issues

Q: Why is it said in Islam that women are not supposed to cook for their husbands?

Q: Can I accept to take some of my wifes savings to bear all the visa expenses including residense, rent, etc. this year? I am married since 2 years. Me and my wife do job. She is a teacher in homeland. While I work abroad (middle east). I give pocket money to my wife every month, as well as food expense separately to my joint family. I get one month leave to visit my family in a year. Two times I brought my wife on visit visa in two years. This year I have plan to save some money and to buy some property in my homeland in future, hence not to invite my wife this time, but she agreed to pay all expenses on her own, which I didn't agree. As I don't feel comfortable to get any of her earnings, because of her talking many times that she strongly feels that, her earning is totally for her. On the other hand she taunts me many times that I don't save enough money to get some property. What should I do?

Q: My husband spends 4 nights with his first wife and 3 nights with me. Out of one of the 4 nights with his first wife, he sleeps in a separate bed in another room but under the same roof. Is that counted as 4 nights or 3 nights?

Q: Can I touch my private part on my wife's body or chest? Is there any gunah or not?

Q: I have heard that masturbation is sinful and haram in Islam. Is the ruling the same for women, since mostly all the answers are related to men? I feel bad and guilty after doing it and I have also heard that masturbation can cause psychological problems and mental illness such as weak memory.

Q: Is the mahr of a non-virgin woman the same as a virgin?

Q: Is there any narration in regards to throwing kajoor in a nikaah? 

Q: Is it permissible for a pregnant woman to find out the gender of her baby.

Q: I wanted to know what does shariah say about a girl riding bicycle? Because my small daughter is insisting to buy one.

Q: I had zina with a girl (both of us are unmarried) right 1 hour before our Nikah, we didnt got time to take a bath and we completed our nikah like that only. Is my nikah valid or invalid? Should I have to do again nikah with her?

Important Note: The girl had zina with a person long time ago in her teenage years, in her past...and she repents it. After that I had married her.