You realise something

You suddenly realise something "Hang on that was the second load you swallowed. Your a robot you don't digest so anything that goes down your throat should still be there. How come you still needed a second sample?"
Your fembot suddenly has a worried expression on her face and she tells you "We fembots are fueled by human cum. As long as you supply me with it I can keep going."
"How often do you need refueling?"
"At least once a day. But I was running low on power and needed a double load today."
"Well if you wait a bit I might be able to give you some more."
She just smiles at you for that.
"How were you fueled before they sent you to me?"
You people who me and the others supplied us with enough to keep us going. But then they built to many of us and they could not keep up with the demand. They redesighned my outer body to your needs and sent me here"