The entire point of AI is human ability without having an entire human there too.
Making an AI that wants to have sex with one's self is on the same level as the designer of the holodeck explicitly stating that his intention was holo-bimbos and marketing the tech solely on those grounds. Sure, it's impressive and all, but it still leaves a greasy feeling in one's soul while one looks on and sees the point being missed in spades.
That just makes the AI creepy too, really.
We made AI, and now it wants to have sex with us as one of its primary goals. Eww