"If she fakes it and does so happily...is it a problem?"
How long do you suppose she'll stay interested thinking like that?
Well...my point is...there is not much you can do unless she tells you, right?
Sure, she might lose interest but whose fault is it then?
If she fakes it...and it seem pretty darn real. I am not going to ask her if she faked it, thus, I will never know.
I am not so sure what this study proves...other than if you want to know what's going on...attach some sort of monitoring device to your female partners brain...ohhhh...that will go over well.