In Chapter 3 of Brave New World, Huxley switches between several scenes at short, uneven intervals. However, there is a pattern to these parallel scenes. His framing device is expositional dialogue from Mustapha Mond. Mond explains the origins of this dystopian world with scenes showing the effects on its culture on the lives of ordinary people.
For example, at one point, Huxley swaps between Mustapha explaining that one of the tenets of this society is that "history is bunk" and no one is aware of their rich cultural heritage. This is reinforced with a scene where an Assistant Predestinator asks Bernard Marx and Henry Foster if they are going to watch a presumably trivial film featuring a "realistic" love scene. This implies the characters have no taste for art, and don't have interest in any subject beyond the senses and the present moment.
At another point, Mond disapprovingly explains what families and marriage were like in the past. Huxley intercuts this scene with one of Lenina Crowne and her friend Fanny discussing how odd it is that Lenina has been dating the same man for four months. In this world monogamy is looked down upon and seen as dangerous.
These abrupt shifts make the exposition less tedious. It would be far less dramatically interesting to have Mond describe the rules regarding marriage and childrearing without seeing how they affect real people. Shifting to how these rules affect people's freedoms and their willingness to love or think critically communicates the horror of this world more than any theoretical explanation could.