Masterbation is safe and normal....Just make sure you use lubrication.
RAAFE it is totally safe.but u should not over do it
Yes its safe if you do it a couple of times a week, but just dont go for it why watching porn or you will end up with porn enduced ED, and you do not want to go down that street, its a bad one.
But just enjoy what you are doing a couple of times a week, and keep healthy, then you will keep happy.
Good Luck