Title text: 'There is also a spike on the Fourier transformation at the one month mark where--' 'You want to stop talking right now.'
Cueball, apparently concerned about the status of his romantic relationship, has constructed a "relationship graph" plotting an ambiguously quantitative metric for love and/or affection against time. He has identified a sudden drop. Cueball's romantic partner (apparently Megan) notes from off screen that the drop corresponds to the moment Cueball's obsession with graphs began. He claims the two events are coincidental, thereby referencing the recurring xkcd theme of correlation not necessarily implying causation.
A Fourier transform breaks down the graph into periodic components. A spike at 1-month on the Fourier transform would mean that something happens every month that causes the relationship to decline. This is probably a reference to Megan's menstruation, that is, her 'time of the month,' stereotypically depicted by having a woman uncharacteristically, sometimes, violently, always ludicrously, crabby.
- [Cueball is pointing at a line graph at a specific point where it slopes down. The Y axis shows that as Y increases, love increases.]
- Cueball: Our relationship entered its decline at this point.
- Megan: That's when you started graphing everything.
- Cueball: Coincidence!