Everybody loves a train wreck. Maybe some people (myself included) enjoy watching celebs' downfalls, and tragedies because it is our way of viewing and experiencing these situations from a safe distance. It's fascinating because on one level or another we can all relate.
Personally, I don't think men are made to be with only one woman. If you look at the animal world most male species prowl. I think for us to expect different would be the whole square peg in the round hole thing.
That being said...I'm not suprised that tiger cheated...just that he was so stupid about it! Seriously...how about a hobby phone! She knew his habits before she married him but he owed it to her to be discrete and not rub her nose in it.