I didn't forget to mention them, I chose not to mention them because they fall into the same probability category as beheadings.
Rape is illegal, and we have a system in place to supposedly stop that to the extent we are able. Incest already has a very strong social revulsion in our society, and I see no danger of that being changed by showing fictional examples of it.
Homosexuality on the other hand, has been pushed and pushed and pushed and pushed by the creators of this content as "normal", and they are trying to propagandize people into accepting it as normal.
They are not trying to make rape or incest appear normal. It is still portrayed as deviant and wrong.
The show takes place in an Apocalypse, what do you think is going on in that situation, when no laws exist all sorts of depravity will take place.
Don’t watch the show if it offends you.