Nikaah & Marriage Issues

Requirements of a valid nikaah

Q:

1. What are the requirements of a valid marriage in Islam? Is the consent of parents mandatory?

2. If a girl and boy (both adults), in the presence of two adult male witnesses and without the consent of their parents, performed Ijaab and Qabool (without any duress and with free will), is this nikah valid?

3. If the answer to question 2 is 'yes' and if the parents of both the girl and the boy agree for their marriage in future without being aware that the girl and boy have already entered into nikah, (and the girl and boy do not want to reveal this fact to their parents), can they enter into nikah again when the marriage takes place for the purposes of registration in union council?

Husband stimulating wife

Q: If my husband stimulates my breast while I keep my legs closed and due to the added pressure of my legs being closed I reach climax, is this allowed? Because it’s very difficult for me to finish with my legs opened, so even though I ensure he finishes with normal vaginal penetration, I need him to stimulate me some other way in order for me to finish and this requires my legs to exert pressure on my private while he massages my breast or something of that sort. I’m not sure if the fact that he is stimulating me makes it okay or whether the fact that I am exerting pressure with my legs at the same time turns it into masturbation. Please advise.

Witnesses for a nikaah being under the influence of drugs

Q: I got married secretly in a car whilst I was waiting for my future wife. Me and my 2 male friends were under the influence of drugs (weed) so when I said to her, will you marry me, she said yes. I asked them did you hear that. They said no. So I said it again they said no we didn’t hear her and laughed. The 3rd time I said it, they laughed and said yea yea, but I don’t really think they heard her say yes. Is my nikah valid due to the witnesses being under the influence of drugs and not hearing her say yes?