Spent a week working solely on the cooking/eating feature. Now, after putting the cooked food on table (as seen in the video below), you (and your girlfriend) can actually start eating it.
The food will decrease hungry/thirsty stats of your girl, with each food item having its own effects, multiplied (or divided) by food quality. The girl also will have specific likes/dislikes for every food item in the game. Giving her food she dislikes will affect your relationships. Depending on her personality, your girl may be more picky towards food/quality, or more tolerant.
In sandbox mode (the first game mode to be implemented) personality of your girlfriend will be either 100% random, or chosen according to a personality test you’ll have to complete once in the beginning of the game.
Finally, she will remember a list of recent food you gave her, which will also affect in the long run your relationships. For instance, cooking the same food every day can cause your girl to start disliking that food, and decrease your current scores. This feature, again, will be affected by personality. A more picky girl may start complaining if you give her the same omelette two times in a row, while a more tolerant one won’t mind even if you’ll cook it for a whole week in a row. That more tolerant girl may have other personality traits requiring careful game tactics, of course, so she won’t necessarily will be “more easy”.