This is crazy.

"Um… does that mean you… you did those things with them, even though…"

She tried to put her words into thoughts, but that didn't seem to work out.

"Just to be clear, in no way I'm saying it's a good thing." The Doctor replied. "As I said before, I'm really ashamed of what I have done back then."

For a long time Sam thought of the Valkyries as nothing but highly advanced sex bots and sleeping with them was his only objective. Whenever he remembered that he had such a mindset, he couldn't help but feel disgusted with himself. 

What's worse was that, while he hated his previous thought process, a part of him didn't regret any of his actions. The intimate moments he shared with Nine, Five, and Three were some of his best memories, and thanks to them he was able to get closer to the three and learn the truth about them.

"I… I never knew it could work like that…" Eleven murmured to herself.