And about the possible downsides... Well the cum part obviously is something real, cum is a very important part of porn. Definitely worth trying multiple ideas here. Other than that I don't worry too much about the dynamics of the actress and the doll. I think what a lot of people don't really understand is that those girls are acting in the first place! Sure, sometimes there might be some real chemistry going on between actor and actress but most of the times she won't be even interested in the guy, or worse, even dislike/detest him. He pretty much is a 'doll' in her mind anyway which she needs to fuck to do the scene. So I'm sure most of the times this won't be really an issue.
Other than that, there are enough advantages here, apart from the main goal of making the 'girl only' option work so much better and have people see their own dicks instead of an actor. The fact that SLR could use girls that normally wouldnt do porn with an actor is a great bonus, as the fact that production would become easier AND cheaper, which is good for us too, since SLR could use that money for producing more scenes, better gear, etc. Definitely worth at least exploring this idea.
