Why Men's Friendships Are Different

"Studies show that in their late 20s and 30s, women have a harder time staying in touch with old friends. Those are the years when they're busy starting careers and raising children, so they don't have time to gather for reunions. Money is tighter, too. But around age 40, women start reconnecting. Before the 1990s, researchers assumed this was because they had more time for friendship in their 40s, as their children became self-sufficient. But now researchers consider this middle-aged focus on friendship to be a life stage; as women plan the next chapter of their lives, they turn to friends for guidance and empathy.

Men, meanwhile, tend to build friendships until about age 30, but there's often a falloff after that. Among the reasons: Their friendships are more apt to be hurt by geographical moves and differences in career trajectories. Recent studies, however, are now finding that men in their late 40s are turning to what Dr. Grief calls "rusted" friends—longtime pals they knew when they were younger. The Internet is making it easier for them to make contact with one another."

Why Men's Friendships Are Different - WSJ.com