sasori never really had a libido to begin with even before he turned himself into a puppet. he was just sorta apathetic about the whole sex thing, maybe once or twice getting a little hot around a certain person and a few surprise boners once a while. all sexual desire was threw out the window when he loss his genitalia and other parts of body responsible for libido and physical pleasure. he has no real desire for a relationship besides maybe a somewhat close friendship but he has trust issues and just hates physical contact so even that is a big maybe. he is not lonely nor antisocial for he loves having intellectual conversations about art, philosophy, and other similar subjects with those who he deems tolerable. he is fairly happy the way he is as an aromatic asexual.