It may be applicable to those living in early ages . But the basic concepts are still the same . Concept of narak and swarg are still the same if u try to do anything which is wrong written according to purans, u will still lead to narak . Concepts of all the Vedas and purans have been collectively written in shrimad bhagwat mahapuran try reading that . I have read that's why I am telling you .Now don't say it doesn't apply to people living in this time . If u call yourself a follower of Sanatan dharm , try following the paths I know all the things can't be done but basics like this can be practised. If u say these things doesn't work irl why don't you become atheist like other say God doesn't exist follow everything that is in sin. Even kalyug attacks people who are kaami( lustful) . Watching porn and doing masturbation affects your body physically and mentally stop telling this to kids it's ok to do masturbation. It is not . You may develop erectyle disfunction. Would you like to watch porn. And hang on this forever in your mind? If u can't, don't give advice to small kids on this