Ghusal

Q: I have a urine leak problem. So after I shower I wipe dry then wash close to the slit so that I can be as pure as possible and then dry that water up. At times the water flows away without leaving a bead of water left over and sometimes it leaves a bead.

Now I fear that if that bead of water moves it will go on a part of impurity on my private part, all the water on my private part in some way or the other is connected to each other due to lines/wrinkles on the skin. 

Does it now make the whole private part impure? What would be an easy way in making istinja or even coming out of the shower? 

Sometimes in attempt to get the water to flow off immediately I spend 45 mins plus in the bathroom.

Q: For fardh ghusl, is putting a wet earring in the ear holes necessary or is rubbing the hole with wet fingers sufficient?

Q: I wanted to know if a woman has to wash inside the lips of the private part where the urethral opening is situated as the urine comes from it? Doesn’t it make inside the lips of the private part impure? 

If yes, do I have to wash the inside of the lips also during fard ghusl?

Q: My question is regarding the validity of intercourse's in Islam. I newly got married. Once we were trying penetration while standing. The attempt was briefly for 20 seconds. The standing position is a bit difficult position and I know that my full tip of penis never penetrated her vaginal opening. My wife says that it never penetrated her vagina. 

Now I am getting waswasa what if my tip of penis entered the vestibular area or got a cover from labia minora. What to do incase of doubt when the wife is sure that penetration never happened and I know I never penetrated her vaginal opening but not sure if the full tip maybe disappeared in to the vulva (Farje kharij). 

What to do in this case? What should be the case if my wife is certain and I am uncertain?