Great article, and one that very much applies to our own situation. More often than not we have seen couples where the wife is the primary driver in their non-monogamous adventures, even though stereotypes firmly dictate otherwise. Honestly, I can't imagine it working very well when the opposite is true.
We have seen, on this board and in life, newbie couples whose husbands are surprised and dismayed when their wife's sexual appetite surpasses their own. I always advise "Get used to it."