Masaail relating to intimacy

Q: Kindly shed some light on the following:

1. Oral sex , with and without a condom? And a man giving his wife oral?
2. When my wife and I have sexual relations, after foreplay I insert my private part into her vagina and tell her a sexual story while she fondles her private part till she climaxes. Many a times the story revolves around us having sex on the beach while others watch and sometimes we include others in the relationship story. Is this acceptable?

Q: I want to know can we have sex from back side?

Q: After having sex with my husband, I don't feel satisfied and have strong desire to have complete satisfaction. If I touch with hand or with shower I get complete relief. Is this masturbation?

Q: My wife loves intercourse. When I watch pornography I can have sex numerous times. However if I don't watch porn I am not able to give much effort during sex, which upsets my wife. So what is your advice?

Q: I am married for 13 years but I am not sure how to perform the wifes needs in bed according to Islam. I have been doing it fully naked inside the blanket or covered by a sheet and looking at each other. Is this allowed?

Q: I wanted to ask you two questions about the intercourse between husband and wife.

1. Can husband and wife have intercourse in light?
2. Can husband and wife have intercourse in such a position that husband is under his wife. I was told me that in intercourse wife should always be under male and this is the only shar'ee method or intercourse.