Faraaidh and Sunnats of ghusal

Q: During ghusl of janaabat, is it mandatory for a woman to wash her long hair entirely after intercourse? Or only the front of the head hair should be washed if it is difficult to wash and dry long hair?

Q: I have a disease of dripping urine. If the urine drips while I perform ghusal, do I need to perform ghusal again?

Q: Does sitting and taking a bath fall under the aadaab, mustahabbaat or sunan of ghusl?

Q: If I had a wet dream and I need to do ghusul, after washing my private parts, is it necessary to wash my feet because when I wash my private parts, the water will flow to my feet?

Q:

1. Should the meat stuck between the teeth be removed during ghusal?

2. Should the white layer around the edges of the nail that may be dead skin or something like that be removed during wudhu or ghusal?

Q: If a person has a wet dream and in the surat of taking a ghusul, should your half body be covered, or if you don't have cloth to cover your half body and is it possible to take ghusul in naked condition, please janab let me know.

Q: Im newly married... After intimate relations with my husband we have to do gusal, but someone told me that I dont have to wash my full body. I can wash half my body, from navel down to my feet. Is this true?

Q: Until now I did not turn my nose piercing and ear piercing holes during ghusl and wudu.

Would all my prayers since I got my nose piercing (about 8 months ago) be invalid as I did not turn my nose stud/jewellery so water can reach the hole during ghusl and wudu.

Q: I have a problem of urine drops coming out of my body after urination. Similarly when ghusal is farz on me after dream at night and I am in shower doing ghusal, many drops of mazi or mani come out of my body, even during ghusal. What shall I do in such a situation? Shall I repeat my ghusal right from the start or continue doing it and finish it? 

Q: I performed farz ghusal. However, after an hour I saw a napaki stain on my leg. It was hard by that time. Will I have to repeat the ghusal?