A lot of people aren't comfortable with showing emotions in front of others. Could be that it'll suddenly hit you, and you'll say to yourself one day whilst washing the dishes, "Hey, I'm gonna be an uncle! How awesome is that?" and you'll laugh to yourself as you continue to scrub, and that'll be it
Cos if so, about 90% of the men in this world, and a good portion of the women too, must be autistic.
Life's not a movie... we don't all follow scripts and respond as the director says we "ought to", in his opinion, respond to our cues.