Personally, if that envelope is the only attempt at communication in the 20 years since he left then I don’t see how any of them are sweet. They would all be emotionally manipulative and tragic for their very isolation.
But this is a show from which I want no real drama or very-special-episodes so I think it best that they just ignore this story line ever happened.
I feel pretty certain that they are foreshadowing a Bernadette pregnancy. I predicts that’s the season closer - or at least an is-she-or-isn’t-she. . .
Nitpick: I believe that Howard’s father left when he was eleven and the envelope was left for him when he was eighteen, so it was the only attempt at communication in seven years, not twenty. (Although for all we know, he was in communication with Howard’s mother.)
Unless Howard is sitting on a pile of unopened envelopes that Sheldon missed, my assumption is that the envelope is the only communication between when dad left and the current day (thus my 20 years number).
I dunno. Sheldon firmly believes that anything which feels good to him should immediately become his center of existence. Once he gives in and tries it I foresee some serious overindulgence. WE’re talking Zazzy all over again. I imagine a scene with a thoroughly disheveled Amy coming out of Sheldon’s bedroom wrapped in a bedsheet and rummaging in the refrigerator for Gatorade. ;)
The last time Sheldon contemplated reproducing it involved a petri dish, so that would represent some growth of the character.
“Sheldon, no. Sheldon, I have to go to work. Sheldon…”
<sotto voce> It’s worse than dropping an electrode into his brain. At least then I could pull the cord. </sotto voce>
I can imagine Sheldon reading up on parenting practices, getting enthusiastic about one and trying to convince Amy to practice it. Attachment parenting is an obvious choice but I’m sure there are other parenting techniques that have comic potential.