Puts the spice back in the marriage? Lolz!

Not acceptable anyway, as it's plain selfish, HIV n all other risks. Variety being the spice of life, he can have as many female friends as he wants to but at the end of the day, he should come home to only his wife/partner.

And it works both ways :P

Also, if there's something lacking in the partner, perhaps no pole dancing skills or the like, then it's up to him to be proactive and do something about it rather than taking the easy way out.

"Vaillant reckons that men who keep mistresses actually improve their marriage."

Well, there is some truth in this, like most misleading statements, people get bored of routine and take a break from their partners to get a breather. I'd say that's healthy to do so but take a break like travel or do some activity separately for that breather!

"For such men, who are in fact profoundly monogamous, infidelity is almost unavoidable".
Hmmm.. now that is worrisome and feeds the wrong perceptions.

"In her book, Vaillant insists that fidelity is not, by definition proof of love."
Yeah, it's a proof of character. This statement simply justifies weak characters.

Yawn! ...