Why is whacking ti viewed negatively?

I say society should be comfortable with the idea of people masturbating frequently, and in public.  Pornography should be readily available, and widely accepted.  Masturbation and porn should not be a sin, nor should it be shameful or something to be hidden.  We must all whack it sometime.  Let us have a moment of silence. 

>>5
if its a girl, its okay, otherwise its pretty gay.