Olivia lives in Oud-Zuid, a short walk from the big museum square, and she has spent enough afternoons there herself to know how galleries tire the legs more than a long walk does. Her sessions are usually an hour of erotic oil or nuru, and she likes the guest to tell her in a sentence what the day has been. English is her single working language, spoken in an easy, friendly way. At twenty-six she is warm, relaxed and completely firm about the limits she sets out before the session. When nuru is the choice, she lays a waterproof sheet over the bed and warms the gel in a bowl of hot water from the tap, so the room needs only a working shower. At the close she shows how to rinse the gel off quickly, and her sheet goes back into her bag. An hour of nuru loses part of its time to that set-up, which is why she often suggests ninety minutes for it.

Olivia decides which bookings she takes and may decline any of them; she sets the limits for what a session includes, says what they are, and may end a visit at any point, as the terms set out.