Clearly a divide forming here and I am totally with OverMyDeadBody and Madamez.
I think it is very pertinent to turn this situation the other way round, as Madamez did. There are plenty of threads in this section about controlling husbands who stalk their wives' emails, who don't let them use internet, who limit their ability to meet up with anyone else. Telling a partner not to use facebook is no different, IMHO, and is in itself controlling behaviour.
Look, facebook is slightly addictive and even slightly immature. I sometimes find myself doing a movie quiz, answering questions about East Enders or fighting wherewolves when I should probably be working. But, as such, it is no different to reading a newspaper at work/ having a fag/ going to the loo. It is entertainment.
When I joined, it found loads of people (using the email addresses in my contacts list) I hadn't been in touch with for ages and also found lots of people who I had only briefly met, maybe when travelling. It was actually quite cool to catch up with many of these people. They see on my page that I am married (pics of DW all over it!). It's nice to reconnect with people, even if they only came into my life briefly. DW has no issue with this whatsoever.
And... when will people realise that men who have healthy interractions with other women are likely to be better partners. Ok, stereotype alert but they may have a more intuitive, sensitive side to them. Often, bouncing things off female friends can be really constructive to a relationship, just to get a female view. As I say over and over again, not all men are cheating bastards and not all women are predators.
in fact, there is something very attractive about a married man because many women will feel safe and not feel they have to worry about him hitting on them. This creates boundaries for nice friendships - and the same rules apply for brief friends as well as longstanding ones.
As for flirting, that is a loaded word. I happen to believe that everyone flirts all of the time, with both sexes. When we meet someone, be it at work or play, we are trying to create a chemistry with them in some way. We are basically saying "hey, i want you to like me and get on with me and interract with me". We are trying to create a chemistry. I wish people could understand that trying to create a chemistry with others does not threaten our relationships at home. There is a big line between chemistry and sexual chemistry - or, as Madamez puts it, sticking a cock in a girls ear!!
Finally, let me give you an alternative steer. I personally feel that it is the strength of my marriage which enables me to make and have and keep my friendships with women. It is a sign of our mutual trust that I have the confidence to have these friends. And the same is true for my DW.
So far from my friendships (and acquaintances) being viewed as bad or as a threat, they are actually viewed as a sign of me being a healthy individual, able to interract with a rainbow of different people, from foundations and the security of a strong and loving mariage.