This is why Bayesian filters are good for spam identification:
Because it is measuring probabilities, the Bayesian approach considers all the evidence in the email, both good and bad. Words that occur disproportionately rarely in spam (like though or tonight or apparently) contribute as much to decreasing the probability as bad words like unsubscribe and opt-in do to increasing it. So an otherwise innocent email that happens to include the word sex is not going to get tagged as spam.
Among all the other reasons, I mean. Where do I download?
