In my opinion having your dinner cooked and the groceries bought is the best thing ever and I’d do anything for that. The thing is, house work can be done anytime, and if you can’t be arsed one day and put it off until the next day, no one will notice. Whereas the food shop HAS to be bought, dinner, lunch etc HAS to be made or you’ll not eat. Everyone notices that. Also, one person cooking dinner every night means they have to come up with different meals constantly which can be a total pain in the arse or else you’d get bored eating the same stuff week in week out whereas if there were 2 people sharing that job, it naturally would be mixed up a wee bit.