Masaail relating to intimacy

Q: Is there any dua to recite before having intercourse?

Q: I have had spinal cord injury therefore, I don't get erection so no sex. My wife needs it and I want to do it. I am a young man 40 years old. Doctors can't help me. My question is can I use a strap on penis to satisfy my wife and myself and to keep the family from breaking apart?

Q: Is it permission to listen to music with one's husband to be more romantic and is it permissible for him to sing for his wife or for the wife to sing for him?

Q: According to hanafi madhab, if a woman has a sexual urge during menstruation, is it permissible for her husband to rub over her private area (while the area between her navel and knees are covered), until she reaches orgasm? If not, can he satisfy her by playing with her breasts?

Q: I want to know that how many times can a man have sexual intercourse with his wife in one night? If he does it more than one time, does he need to make ghusal for the same amount of times (he did intercourse)?

Q: Can a man remove hair in the private parts of his wife and vice versa?

Q: We know that sexual intercourse is haram when wife is in menstrual period but can husband masturbate his wife during menstrual period if the wife agrees and reaches orgasm?

Q: Please advise me, my husband compares me with other women during intimacy.