What bugs me is that things this are extreme acts; and i believe should only be in porn that's labelled as such.

There's a Roxy Jezel GBA scene that has this - and that I can't watch because of it. I was looking through some
scene download site once and it had this scene. And it also had this warning:
She gets choked out in this. If that's not your thing, then do not download.

[Link]