I don't like the idea because it takes away having to deal with the discomfort of actually being with a human.
For example: A tired student knows its dealing with a robot and creates a habit of resting one of his hands on the robots chest areas. The students career is then cut short because of all of his sexual molestation charges.
Don't judge, it happens to the best of us
The example is more just me being bored out of my mind at work, but I think it expresses my point pretty well