I think the issue is that the "family values" thing I the type of thing one should personally strive to achieve. When family values are preached - people are more concerned with how other's act. If you want to show you are family values - keep your own house in order and you do not need to announce it.
In terms of affairs and such...they happen in real life and in political life. Unless there is something other than the affair (government secrets, underage , rape, bribery/extortion)I think the affair is a family issue.
And frankly - the "family values" moniker is used frequently to address gay issues. Again, not applying the "family values" to themselves, but used to bash others. Family values to me - assuring that your children are safe, fed, clothed, well educated, and healthy. It has nothing to do with pointing fingers at others. It reminds me of religion in general - it should be used as a blueprint on how to run your own life - not used as a weapon to degrade others.
But yeah, Clinton's sexual exploits were not a proud moment for him - and painful moments for his family. But as long as he wasn't screwing a kid or giving away government secrets - it was none of my concern. My concern was how this country faired under his Presidency. Pretty damned well. And frankly, he likely could be elected again if rules allowed.