How was curry dirty talk? Can anyone explain?

I didnt really get it.. but I think it refers to the fact that he said that he tasted better than the curry he cooked (the one that was too spicy) after the blowjob lol

Flirty with flattery. He is eating cafeteria curry and saying his curry is better. Like for example, let's say he instead said Eunsan cooks better than his mom.