Examples:

> My father told me that when they were a little boy, they would help their friends with homework.

> The bitch attracted so many dogs in the neighborhood. Now, they are pregnant with puppies.

"Father" is masculine semantically. But the pronoun *they* is used instead of *he*. This has nothing to do with the father's gender identity. The speaker just uses *they* pronoun for an obviously male person.

*Bitch* is feminine semantically, referring to a female domestic canine. Dogs in that context are male domestic canines. Males cannot get pregnant, so obviously, "they" is used to refer to the bitch.

More Examples:

> I am agender. My pronoun is *they*.

> I am male. My pronoun is *they*.

> I am female. My pronoun is *they*.

> Elizabeth is my girlfriend and a great cook. They bake the best cookies.

> See that man over there? They sell street food.

Another Example:

> And so, they said...

> Is your teacher male or female?

> Male.

> Go on.

> And so, they said...