From Wikipedia:

Sex robots or sexbots are anthropomorphic robotic sex dolls that have a humanoid form, human-like movement or behavior, and some degree of artificial intelligence. As of 2018, although elaborately instrumented sex dolls have been created by a number of inventors, no fully animated sex robots yet exist. Simple devices have been created which can speak, make facial expressions, or respond to touch.

There is controversy as to whether developing them would be morally justifiable. In 2015, Robot ethicist Kathleen Richardson called for a ban on the creation of anthropomorphic sex robots with concerns about normalizing relationships with machines and reinforcing female dehumanization. Questions about their ethics, effects, and possible legal regulations have been discussed since then.