They’re just really into food. We watched a Korean cooking competition last night (Culinary Class Wars, basically Michelin star chefs vs other well-respected chefs), and it had a lot of that “watch other people eat” bits, but with some actual entertainment (i.e. descriptions of how dishes are prepared). My SO liked the descriptions of the food (mouth feel and whatnot), whereas I was more interested in the ingredients and cooking process.

I don’t really understand it (food isn’t particularly important to me), and they probably don’t understand my weird fascination with other things (e.g. watching personal finance videos that I strongly disagree with), so I guess we just accept that we’re into different things.