Impurities

Q: My question is that, some times it occurs that we both my wife and me sleep together and I have a discharge during sleeping and this fluid touches the body of my wife. Is ghusal compulsory for both or for only the husband?

Q: The other day I went to the bathroom to use the toilet and noticed a brown spot on the inside of my underwear. I am not sure how this had come as I had only passed stool the night before only, and after passing stool I had went for a shower/ghusl. In the afternoon around asr time whilst in the bathroom I noticed a brown mark on my underwear and found a mark only on the inside of the underwear. My pants was black so I could not see if there was a mark, I did check and found nothing. I had also checked the same spot on the outside of the underwear and it didn't look like any brown mark there but because it was material there was a slight smell. I had sat on many places during the day, some of these places were my car, rooms in an office, doctors office, home etc. Do these places become napaak wherever I sat? I am always very very careful with regards to istinja and as said I am not sure how this happen. It might have happened when I broke wind etc. Please advise urgently?

Q: We have dawlance 5200 washing machine and it has the facility of washing as well as swill (khanggalna). It has the system of swill is like that we place all the clothes (having water of surf) in the bucket like structure and open a supply of water. The water continuously falls on the upper side of the bucket filled with clothes and get away from the downward side. After switch on the button the bucket spins and the whole process is for the ten minutes. The number of clothes filled in bucket is approximately ten. One day mistakenly my mother mistakenly wash a dirty (napaak) clothes of having mani with the other clothes in the washing machine and the swill as usually. Will all the clothes be na paak?  We have to clean all the clothes? 

Q: I have been having quite a lot of nose bleeds recently. After the bleeding stops, after washing the area a lot, there are no visible traces of blood, but you can still smell it. What is the ruling on this?

Q: If a root of a hair falls in ماء قليل (little water), does it become najis?

Q: Sometimes I notice a stain (white, mazi) on my pants but I don't know when it came out of my private part. I don't know if I need to repeat the previous salaat or not? What should I do in this situation?

Q: After intercourse with ones spouse, is it necessary to wash all the bedding and linen? Or just the spot that's messed? Also after one performs ghusl , semen comes out, is it necessary to repeat ghusl?

Q: Is it jaaiz and permissible to use donkey milk soap for washing face and hands? Please advise on that.

Q: Does getting urine on one's body require that person to perform ghusl? Because in old age sometimes one gets a few droplets of urine on oneself
without knowing, what should one do in that case?

Q: I wanted to find out if precum is napaak? Do I have to change my underwear everytime I get precum?