There's this junior I've been training. We gave him a bigger task than we usually do

"How do I link an object in table X with the corresponding object in table Y?"

"How are objects in two tables usually linked? How did you link Y with Z in the first place?"

"Em... Foreign Keys?"

"Yup"

"But there's not foreign key from X to Y."

"Well, create one. You've got full creative freedom over this task."

I sometimes feel like Juniors are either completely careless about past code or overly carefuly with not editing any past code. Frustrating but adorable