You don't strictly need lubrication. On the other hand, any lotion that is designed to be used on your skin will work. So will vegetable oil.
mastrubation
Just Stop.
No it does not.
Stress relief
Masturbation doesn't do any damage.
There is no best way. It is whatever you find suitable.
You need to lubricate the squeaky hinges.I will lubricate the parts later.
No reson to lubricate a scope.
The verb of lubricant is lubricate. As in "to lubricate something".
It is unnatural and thus Haram in Islam. Islam lays great emphasis on marriage.
You do not need to lubricate any modern steering wheels.
No, it is natural. However excessive masturbation may be a symptom of sexual or social dysfucntion.