A study found that people who drank cold tea were more likely to choose a romantic movie than those who quaffed hot tea.
Researchers Jiewen Hong (Hong Kong University of Science and Technology) and Yacheng Sun (University of Colorado, Boulder) also analyzed movie rental data from an unnamed online movie rental company to back up the findings.
They hypothesize that a physical chill causes us to crave psychological warmth. But let's not forget that the body and mind are connected.
Part of oxytocin's phsyical effects are increasing relaxation and blood flow, which would physically warm you up as the romantic movie causes your brain to release oxytocin.