He who is The Real Bev said on Mon, 25 Dec 2017 14:42:17 -0800:

a. True, they learn he is boinking he through Facebook.
b. True, they learn him is boinking he through Facebook.
c. True, they learn he is boinking him through Facebook.

BUT people who grew up in certain areas, or whose parents did, will in
certain circumstances use constructions like "Him and John went to the
movies" even though they are college-educated and NOT stupid; they just
can't break the habit even though they KNOW better.

Our friend, whose parents were from OK, asked us to tell him whenever he
did it. We finally gave up. 65-year habits are hard to break without a
more compelling reason than the vague desire to be more grammatical.

We all make typos and speakos - and we even make thinkos.

But if it happens all the time - then it's just stupidity since nobody is
ever taught in their grade school English class to use personal pronouns
incorrectly.

Pop Quiz:
a. "Him and him went to the movies"
a. "Him and he went to the movies"
a. "He and he went to the movies"

My point is that the beauty of personal prounouns is that we already know
how to use them. I do understand your point though, which is sometimes we
don't know how to use them.

For example, when someone asks if it's you on the phone, you respond:
a. "This is I"
b. "This is he"
c. "This is him"

Even I have to think twice to get that right. Do you?