Ghusal

Q: Does making only ghusal suffice for wudhu or should I makes wudhu separately?

Q:

1. Should I brush my teeth in order to remove the yellow particles before ghusl of janabah or can I just gargle my mouth? (Just gargling wont remove the yellow particles on the teeth)

2. I know that if one food particle is stuck on the teeth and is less than the size of a chana then no problem but what about if many particles got stuck in many teeth?

Q:

1. When a man inserts his tip of penis in other man's anus, both should have fard ghusl right?

2. Is the ghusl fard even if when both had worn clothes? E.g. If one had worn pants and the other had also worn pants but penis went inside anus along with both pants. Is ghusl fard still? 

Q: Suppose a boy has to do ghusl for janabah and I need to inform him how to do it. Ususally people tell them the obligatory acts in ghusl which are three. But I think that this is not sufficient because there are many precautions in ghusl which should be taken and known so that one has a valid ghusl.

So when I want to inform someone about fard ghusl and I just said to them about the obligatory acts and they follow those their whole life but are unaware of the precautions then their ghusl would be invalid their whole life.

And how can I tell them all the precautions. And if I tell them also then I fear I will remember another precaution after some time which I forget to tell them and if they did ghusl and then how can I tell them the forgotten precaution and tell them to repeat the ghusl? And some things which prevent water from reaching the skin such as wax or sticker etc. That things also I need to tell them and after that I remember some more things which prevent water from reaching the skin amd if I tell them thses many things for a ghusl they will think that I am too deep in religion and I don't know if they will listen or not.

1. What do I do?

Precautions means the things which most people forget to do in ghusl. There are 20 for men and 6 for women, I will mention one of them "The joint between the chin and the throat will not be washed unless you lift your head upwards." Like these, there are many.

2. While getting up from sleep we have bad yellow particle on teeth before brushing, must those particles be removed before doing fard ghusl or just gargling in sufficient?

3. What about the food stuck between the teeth?

4. What about the tongue, should the tongue be cleaned with a tongue cleaner before fard ghusl because there will be some particles spread on the tongue which can only be removed by a tongue cleaner?

Q: If we miss Khilaal of the feet during Fard Ghusl, but we pour water on both feet. Is our Ghusl completed or not?

Q: If one goes for a colonoscopy, is it necessary for a fard ghusl before making salaah or can one just make wudhu?

Q: I recently got breast abscess and the doctor advised me to take a shower down from the breast. I want to ask that if I need to take a compulsory bath like after periods or intercourse, how do I perform ghusal since we have to clean the full body including head. Please guide me.

Q:

1. When I start sleeping then in the beginning I don't sleep completely and some sexual things flash in my mind and some mazi comes out so this would be counted as wet dream? I am sure that I didn't have any vaginal throbbing nor did my heart beat get fast, so do I have to make ghusl?

2. When I woke up then I remember having a wet dream but there was no wetness nor mani or mazi but there was very little spot on my clothes which was looking like regular white discharge, so should I make ghusl?

Q: I did ghusl, but afterwards I found out that there were some food particles in my teeth. Do I need to do ghusl again or just rinse my mouth again?

Q: I have heard that oil prevents the water from reaching the roots of the hair. Now I am confused. If oil is applied to the hair will the ghusl be valid or do we have to use shampoo or soap to remove the oil?