cutting hair

Q: Can Muslim men shave their hairs on the chest, arms and legs?

Q: Please advise regarding the following:

1. Is it permissible to cut nails and hair during menstrual period? Elders say to keep it safe until haidh/nifas period is over and to wash it off after that and to bury it. 

2. Is there any specific dua in Qur'an or hadees to change the husband into obedient slave of Allah (because he is not convinced of Allah's wrath if he commits zina after marriage. He refuses to stop contacts with a Christian lady over social media saying that theirs was and will be pure frienship. But I knew few months back that they committed zina several times and continuing contacts even after she married another guy). I wish Allah will change him one day eventhough I know very well that he is very much addicted to her. It was his main hobby to chat with strange girls and became close to them. He isnt stopping it after our marriage. He isnt serious about life after death. I dont want him to die as a person who committed zina. I love him sincerely eventhough I wished and prayed before nikaah that the person who marry me will be a religious guy who is concious of deen. My family will consider me as a burden if I become a divorcee, even if I struggled alot and have valid reasons to seek divorce.

Q: Do hair and nails become impure once removed from the body?

Q: From which areas are men allowed to cut their pubic hair? Are they allowed to cut the hair from the hip as they do from the front?

Q: Can someone carry a baby whose hair is yet to be cut?

Q: I am a boy. When I go to the barber shop, I ask him to cut my hair short on my sides and the back of my head. But I ask him to keep the front hairs relatively bigger than those at the back. Is it permissible or must all the hairs be cut equal from all sides?