Really? I guess everyone's different. My DH and I have some mutual friends, but most are our own friends. I have guy friends that my husband hasn't met (now, granted, I work in theatre, so most are gay, but not all.) He sometimes goes out to dinner with work friends, and since he's the music teacher at an elementary school, most of those work friends are going to be women. I don't know any of them, and that doesn't bother me. Why should it? I text a lot of my friends - sometimes important things, sometimes silly things. Again, should it matter?
I guess everyone's relationship is different. I'm turned off my jealousy more than anything else. It's the reason I dumped my boyfriend that I had before I met my husband. My first reaction to a husband from the original post, would be not to have married someone like that and if I had, take the hard road to divorce.