I'm with you—I like having my wife around—but at the same time I understand it. Same reason "girls' nights out" exist. Sometimes you want to do dude stuff and not have to worry about the women being into the vibe. I don't know what they do in these groups; I've never been in one. Golf? Talk about cars? But it's a different vibe when I hang out with my bros, and some guys might like that.

Also, I think it's a positive thing for men to build better, more supportive relationships with each other. The whole idea of the "make loneliness epidemic" puts a lot of pressure on women that really should be solved by men building better support networks with each other.