I think a perfect marriage has room for each spouse to build friendships and have independent adventures.
Friendships and adventures with the opposite sex? You would have no problem seeing your husband go away for a week to be with some other woman, and is offended if you should ask any questions?
All you have to do is look around newcomer threads and see how that works out for marriages! This line of thinking across society today is why men have this idea they can't say anything to the W giving another man more time & attention than she's giving her H and kids.
I agree that women need friendships and time spent with other women. To have private/secret friendships with the opposite sex is inappropriate and an invitation for infidelity. The W has no business going away on some adventure with another man. (And the same applies to husbands).
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!