Trying to remember if my fiance and I ever fed each other before we got engaged. Her and I also do the types of things you see in manga, but this one was a bit too nuts lol.
I think this is the arc where FMC's mom and MMC's sister try and push them in the proper direction.
My wife often finds chances to stuff her latest creation in my mouth. "Here, try this. Don't look at it too closely. Just open your mouth.". Often it is delicious, but she thinks if she cooks Brussel sprouts in a different way I will eventually love them. Also some of her Korean creations are too spicy. When I cook a special meal I always bring the first bite to get her feedback and I sometimes feed it to her.