Masaail relating to intimacy

Q: My friend is married and her husband is troubling her to have sexual intercourse in her periods. Please advise.

Q:

1. If a women gets aroused while sitting with her husband and the vaginal area gets wet,but no intercourse takes place; does ghusl become fardh on the lady?
2. If the husband fondles his wife's clitoris and she does not orgasm but the area does become wet, is ghusl fardh?
3. Can the husband and wife masturbate each other?
4. Is oral sex allowed in Islam, if none of the najaasat is swallowed?
5. Is it permissable for a couple to use vibrators and other sex toys?

Q: Why may one not be intimate with ones spouse on the nights of the two eids? Why is it not allowed?

Q: Is it haraam for a husband to touch his wife between the navel and the knee while she is menstruating? My husband says its not haraam to touch, he just can't use the navel to the knee for his pleasure? Is that correct?

Q: The following are few questions regarding a woman in the state of haidh or janaabat:

1. Can her husband fulfil his desires using her thighs? If not, can it be fulfilled by putting a thin garment in between?
2. Can the husband touch the area between the navel and knee with his bear hands? Also, can their thighs meet without any barrier between together with having the private parts covered?

Q: An old man is suffering from erectile disfuntion. No medical help works. When with his wife, can he mastubate to ease his desire?

Q:

1. Unknowingly about menstrual, wife & husband spend time together. What does she have to do?
2. Is it ok for her to make ghusul or she must make ghusul?
3. In her menstrual cycle time or days she  has to walk through the Musjid a little through the mens section & she has to walk in the middle of the ladies main section to get to the school where she teaches. What can she do about this?