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
No it does not.
Just Stop.
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.
It is unnatural and thus Haram in Islam. Islam lays great emphasis on marriage.
The verb of lubricant is lubricate. As in "to lubricate something".
No, it is natural. However excessive masturbation may be a symptom of sexual or social dysfucntion.
You do not need to lubricate any modern steering wheels.