I'm actually going to agree with both of you on the interaction thing. I'm not much of a fan of games that you have to manually interact in order to get the characters to do anything (and micromanage what they're doing), but on the other hand, I do like having the option of an active interaction, especially when the girl is solo/posing.
In Sexy Beach 3, there were modes for rubbing sun tan lotion on a girl, fondling a girl, and such. It also had a sex mode where you watched your avatar and the girl have sex. It had meters you had to manage and you could manually click and move the mouse to manually control the sex, but you could put it on auto too. I'm less of a fan of the need to manage speeds and controls to make things work during the sex, but I really like having the option to fondle/play with a girl in a solo mode. Rubbing, fondling, licking, and sex toys are all good for that.
I suppose such a mode would require specific sounds and vocal reactions to be made depending on what the player does, and I think it would require quite a bit of UI work, so I don't know if it'd be feasible in this game or not. But it would be an awesome addition.