Perhaps you were on the right track before...

Franklin is, if anything, a very pragmatic person. While he did value his entertainment, he also knew that he would have to make things more manageable with this group, and, if at all possible, make some progress on some of his projects.

To this end, he decided that he would let someone or something else lay claim to some of these women first in order to demonstrate to them that they will follow his instructions the next time he issues a command.

"Since it seems that you all are barely capable of following the most basic of instructions, I will make tonight's entertainment an educational experience. I want you to listen very closely, none of you will move from your spot. If you do, Fred here will make sure I know that you are incapable of following directions and I will make sure to reward him properly."

Franklin heard a few gasps from his captives, which reassured him that the point had been made.

Franklin was about to leave the room, but realized who he was dealing with, "Fred, if any of these girls move from their spot, I want you to tell me. Once I finish the preparations, I will make sure you get to pick from any of them that move to have for yourself."

Fred could barely contain his glee upon hearing this. Franklin would have warned him against making untrue allegations, but so far, Fred had not demonstrated the intelligence necessary to demonstrate deceit, so he went about his way.

The Doctor had many experiments outside of the Dimensional Transporter, many of them involving studying various forms of monsters and creatures that the public was not aware of. Franklin decided he might kill two birds with one stone by introducing one of these specimens into the holding cell. Most of his specimens would take one, maybe two, of the captives for themselves before leaving back for their own containment areas which were customized to be more suitable for each specimen according to their own needs.

Another thought occurred to the Doctor. His assistants had for some time grown more and more agitated on their assignments. Despite their numerous shortcomings, they had done well tonight. Maybe it might be worthwhile to reward each of them with the spoils of their own work? Obviously he would want them to treat their captives gently, they would be kept for further experiments later, but it might be worth it to show some gratitude now... if for no other reason than for it to be repaid at a later date.

The Doctor pondered his choices. He would get his entertainment, make an example to those that remained, and either make progress in one of his experiments or spend a couple of captives to gain some loyalty.

Decisions, decisions...