There was another reason Ben desired to go back. When he checked his stats, something besides the seduction skills boost caught his attention—850 points! It was enough for another Mystery Box!
And where could Yuko be? She said she was in a room that can be considered a prison. It's already a wonder why she didn't resist. Does she have a plan? Maybe. She has 3 years of experience, the same thing probably happened before already. Let's hope it's like that.
It wasn't like he was working for Pure or the Dalki, they would've done anything just to obtain this type of information. Even if Quinn did know, it wouldn't have helped him with anything. Unless he was planning to take on the military, but he could never imagine doing such a thing in his entire life.