As the film proceeds, the favoring of mainstream movie references extends to Bertolucci's own oeuvre: the Paris flat reminds me of settings in The Conformist, the incest evokes Before the Revolution and Luna, Theo's Maoist baggage takes us back to The Last Emperor, a desert tent in the siblings' flat alludes to The Sheltering Sky, and Matthew's espousal of nonviolence suggests Little Buddha.
But sticky encounters between ambivalent people in claustrophobic spaces do not automatically make for riveting drama, as seen in Bertolucci's subsequent attempts, such as Luna, Stealing Beauty, and Besieged.