Did we give up orgies for beer?

Here's Joel Johnson at gadget blog Gizmodo: "In Sex at Dawn, Christopher Ryan and Cacilda Jethá [argue] we gave up sexual novelty for agriculture." In other words, for beer. "As a lover of both booze and sex alike, it's the most troubling existential question I've ever faced: Would I give up easy access to booze to have easy access to more sexual partners?"