As an evolutionary biologist, I look at New York Gov. Eliot Spitzer's now-public sexual indiscretions and feel justified in saying, "I told you so.""Right!" said Spitzer, "she blinded me with science!"
One of the most startling discoveries of the last 15 years has been the extent of sexual infidelity (scientists call it "extra-pair copulations" or EPCs) among animals long thought to be monogamous. It's clear that social monogamy -- physical association and child rearing between a male and a female -- and sexual monogamy are very different things. The former is common; the latter is rare.
The only thing in the article that seems incredible is the inclusion of Larry Craig in the list of sex-scandal marred politicians. I don't think evolutionary biology explains HIS transgression, does it?