Wow I did not expect this to become a thread with so many
comments.
Anyway I wish to comment a bit on some points raised so far:
My personal opinion is that inside humans, we do have some
instincts that would put us in the same category of animals or
maybe worse, as some suggested here..
For example, we can now get to read or hear about news of
natural fathers sexually abusing their own daughters...
Now, how many fathers would do that to their own flesh and
blood? Why is the natural paternal instinct of a father unable to
overcome the sexual perversions?
Without the concept of karma as explained in Buddhism, I would
find it very hard put to convince myself logically and emotionally,
after seeing and hearing such shocking news.
These are some of those many moments that I thank myself for
having the chance to be in touch with Buddhism.