Boys must care about girls when they say this. They pay more attention to girls' health. In their view, being good-looking is only one aspect, and the most important thing is to be particularly healthy.

To have such a boy who cares about himself, we must cherish each other's feelings. You must know in your heart that the other person is doing this for your own good, and you must know how to respond appropriately to each other, so that the feelings of the two people will be particularly good.