Ooooo, jj, what did you get caught doin'?
Nah, just playin'.
I've never been married, so you should probably take my opinion with a grain of salt.
I think it's all about communication. When you're in secure, mutually satisfying relationship, I don't believe that an innocent flirt (e.g. smile or touch on the arm) is out-of-line. For me, the line would be crossed if he decided to share something of himself that we had already decided is for me only. The biggie, obviously, would be his body. That is for me alone once we're married.
I'm still not sure about the intimacy thing. I feel that once you're intimate with someone, whether physically or emotionally, you've already a bit more than just a friend. I guess that would start up the old the old argument, "Can men and women be just friends?" I would hope that I would be my man's best female friend and that he could come to me with anythnig that he had on his mind. If my man was afraid to come to me with somethiing that's weighing on his emotions, there's probably more wrong in our relationship that just some harmless flirting or girl-watching.
Now, if it's something he feels he needs to share with his boys, I would have to respect that (might not LIKE it), but I realize there is "men talk" just like there's "women talk".
Now,
knowing women as I do,
and as your wife probably does, you must realize that amongst those "ton of female friends" are some that are conniving and scheming. They're waiting for either you to slip up or your wife to slip up so they can pounce. If you are truly just being a friendly, outgoing person, you need to make damn sure that your flirtations can't being taken for anything more than friendly gestures. And please, don't go yakking to your female friends about what goes on in your home. It's none of their business and is a violation of your spouse's trust.
So I guess the bottom line is, if it's bothering your wife, cut it out. Ask yourself why you would need intimate attention or an emotional connection from a woman other than your wife. Better yet, flip the script. How would you feel/react if some dude were "flirting" (however you define it) with your wife?
BTW, how old are you? This question seems to come up frequently from people who got married too young.