Oud-Zuid, twenty-seven, and the one to ask about a therapist each when the evening has to be short and still worth having.

Two sessions running side by side in one room take half the elapsed time of one therapist working through a couple, which is the entire argument for the arrangement on a working night. At 720 euros an hour it costs more and it hands a short evening back to both of you. Italian and English, used quietly in either. She is twenty-seven and has worked enough of these to know that two therapists need room, so she asks about the space before the evening is fixed. Her limits are her own and she names them at the start.

Sienna 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.