Hopefully, he never loses that ability to freely express affection. Somehow, I see this slowly dissipate in males as they age. Why? I suspect a combination of peer pressure and lack of positive reinforcement during formative years. The movie, P.S. I Love You, pops into mind. Guys should see it; not quite Oscar material, but speckled with bits of humor and truth. Believe me, I'm no relationship expert, just a part-time observer.
Oh, one significant gift a mother can give her son, learning how to let go.