My DH is the same. We went to see UP when it first came out and there's that scene at the beginning that touches on the subject of IF, which caught me completely off-guard, and I was just about weeping in the cinema (and desperately trying to not make any sound). I think I cried through more than half of that darn movie while the rest of the cinema spent most of the time laughing...

If all that emotion is there, hiding behind a thin veil of "normalcy", it doesn't take much to bring it to the surface...