Whenever the latest Republican politician is caught with his zipper undone, a predictable moment of introspection on the right inevitably ensues. Pundits, bloggers and perplexed citizens ruminate over the lessons they have learned, again and again, about human frailty, false piety and the temptations of flesh and power. They express concern for the damaged family and lament the fall of yet another promising young hypocrite. They resolve to restore the purity of their movement and always remember to remind us that this is all Bill Clinton's fault. What they never do is face up to an increasingly embarrassing fact about themselves and their leaders.