An 18th century CE ivory tool complete with contrivance for simulating ejaculation and its own discreet cloth bag. The tool was hidden in the seat of a Louis XV armchair found in a convent near Paris. Now housed at the Science Museum in London

This was a Louis the XV era chair in a convent.
I will make this clear, this obscene object did not belong to King Louis XV
The author should clarify this.
It looks like it’s to be used as a syringe. The piece its balancing on being the handle for the plunger.
Perhaps it was for artificial insemination. As opposed to mere simulation.