Seams like most bot production is hands off, made by machines.
On the factory floor (milk bath) you have the scenes, Ford speaks with Bernard, but don't have any other humans around.
only have hands on, human interaction , at final stages programming, twerking appearance and other stuff.
Would not be hard to feed…

Yes , remember in the Delores interview , she ask him if he have done something wrong and Bernard reaction is to tell her to delete the whole conversation, right after.
I would think, that making an copy of your boss and have sex with it falls under "wrong stuff"

I have a strong feeling that Bernard have made an (lovebot) version of Theresa , hint is in the way he just interrupted her in episode 1, asking to copy one of her facial ticks, for his private Theresa ?
He certainly have the means and access to do this .
Now imagine (lovebot) Theresa getting sentient, like those in the…