I'm watching Tsinghua University lectures about Chinese architecture over the past 5000 years.
Me: [to Aff] "One of the professors always looks like he's secretly smiling. He looked really happy in one lecture, then he had a less flattering haircut and was less smiley in the second lecture. Now his hair is great again and he's even wearing a very Chinese style shirt."
Aff: "I hope he didn't go through a breakup during the time of the second lecture."