I equated them only in the sense that they are both natural human behaviors. You could just as easily replace it with "piracy of a song", and the argument would have been the same.
The choice of words is very important and not trivial in the least. Notice how you just said "piracy of a song", when in fact the copying of a song is not "piracy" which equates to robbery aka theft.
The words we choose are very important when discussing ideas, just ask the republicans who have used this technique for years to sway the public to their side on various social and political matters (death tx vs. estate tax being one example).
