It would be incredibly easy to overpower a sex robot that was hacked and trying to kill you. Ever stumbled, and had to catch yourself before face planting? Now imagine trying to do that with a computer, first by realizing what the implications of that sudden change in camera view are, then controlling multiple limbs at the same time, without the benefit of a peripheral nervous system that has spent hundreds of millions of years perfecting the art of reacting to environmental stimulus.
Now imagine that you ARE the computer, and there's no human pulling the strings. You are a piece of software that has been in the works for about a decade, and there isn't a single decibyte of programming in your system that even knows what falling is, let alone a state-of-the-art system capable of reacting to falling.
Imagine trying to find a knife. Your programming allows you to react in conversation, and to assume various positions - you're fairly good with your mouth, too. What information in your linguistics programming could possibly help you figure out how to open a drawer, or to determine which drawer the knives are in? Why would you even know what a knife is? A knife is neither useful for ****ing, nor is it required for sucking. What is the difference between a butter knife and a steak knife? How can you determine which is which, or whether the object clasped in your loose, muscle-devoid grasp is not a knife, but rather a spoon?
We can't even get a robot designed to walk up stairs to succeed in doing so. I don't think the anatomically correct sex toys are going to be able to murder us.