This goes along with jaclynhyde's comment early and the answer to their comment from the OP.

There is no such thing as "homosexism".

Ok, I have to butt in here.
Yes, there is such a thing as "homosexism."

If you're having problems with this idea, I suggest you do some research on "heterosexism" before trying to argue this any more.

Maybe you need to some research on "homosexism" too.

Also, with the whole Rachel/Keith, when it comes to RPS, people do know that the people they are writing about are in relationships. It's called, it's just writing, it's fan fiction, it's someone's idea, it's something that someone writes because writing is something love/enjoy/are inspired by. And by writing these RPS stories/slash/het/any form of fan fiction, people are able to get out emotions and share their ideas with other people.

All it is is writing.
It's not like it's real, so what's the big deal?

I have read some very Keith/Rachel fics in the past, but haven't written any. I've only read a few that are actually very good, if you take the time to read them.

I know that Rachel Maddow is in a relationship with a woman and I find it very wonderful that she has a great relationship and is open about being a lesbian. And I know other people who think that as well.

But, that doesn't stop people from shipping her with Keith.
Just like the fact that Stephen Colbert and Jon Stewart are married with kids, doesn't stop people from the shipping them.

You find things like everywhere with RPS.
In other fandoms where the actor/actress is gay/lesbian and in a relationship, people will still ship them with other people even though the person they are writing about is in a relationship.

That's why it's called fan fiction