Masaail relating to intimacy

Q: Can husband and wife have sex when menstruation period is over but she has not taken ghusal after that?

Q: Is it not permissible to stay with one's wife and to have intercourse with her in the month of Safar?

Q: Is it khilaaful adab when couples make sex in a bedroom where an ayaat of the quraan is hanging on the wall in the same bedroom? Please note that the ayaat is written as an calligraphy on a canvas. I also want to know that is calligraphy of the aayahs of quran are khilaaful adab as well?

Q: I have in the past attended a marriage lecture for pre weds and they encouraged women to purchase lingerie garments that a worn by kuffaar women, in the bedroom for the husbands desires and they also mentioned one should adorn themselves before the husband in (marital relations). Is this something forbidden in Islam or encouraged? What is the approach to the bedroom life of a Muslim?

Q: Can a husband and wife be naked in front of each other not covering their private parts?

Q: Is it permissible to use a condom during sexual intercourse for pleasure?

Q: My husband is diabatic and is on strong medicians which has side effects. One of the side effects is he can't always have sex, so to fulfill my needs he uses his mouth to satisfy me. He dosen't place his mouth inside me but at the outkirts of my vagina. My problem is I feel very guilty because its against the sunnah, although my husband tells me it is not haraam and he can not perform sex like a healthy person. Sometime he uses his fingers but that can be painful.

Q: I wanted to know if two partners play and had oral sex and semen was swallowed, would that render a person's 40 days prayer not accepted? I know oral sex is abhorred upon in Islam but what if it happened?