Answers:
yes - if u r not too worn out to do it!
Yes masterbation is on form, automatic and common and help to stifle stress and relieve tautness
Yes, but more for some those than others.
yes but dont bring in it an alternative sometimes too much masturbating can become another stress factor because you cant concentrate on anything else but jerk past its sell-by date..
Sex is a GREAT stress reliever! Especially if someone else is in that to assistance you out!