It would be an interesting experiment to see what happens if you put two really advanced sex androids in a room together.

Probably the same thing as getting two human sex workers in a room together: either sex (their job), call attention the demonization of the sex industry or the exploitation of machinery in said industry, or simple small talk.

Although, consensual sex between two sex robots would allow them to explore their own boundaries and preferences, instead of measuring those of others.