If it states on Lou's profile that she likes to work with Sasha does that mean she will only work with her? Or can I choose another girl to join us? I've been looking up on Amy and she has a few mixed reviews although most are good and she looks hot in her pictures and she's a similar age to Lou which is perfect.
From what I have seen from comments by people and chatting with girls it basically means that is a girl she is knows and is friends with.
You could ask for a duo with any girl but likely then you run the risk of the two girls never having met each other before so will be hesitant with each other.
Whereas two girls who are friends will just jump right at it as they will likely know whats ok and whats not right from bat.
If you search the forums there are a few threads of peoples thoughts and experiences of what is better, two girls who know one another, or two girls who don't know one another for the threesome.