Giving food to a homeless person is very generous.
Jim buys two sandwiches and walks out of the store when a homeless person asks Jim for one of the sandwiches.
Jim wants to react to the homeless person.
Jim says okay to the homeless person and gives them one of his sandwiches.
Jim just says no to the homeless person and continues walking.
The homeless person's hunger is greatly relieved by eating the sandwich.
The homeless person goes hungry all that day and part of the next day too.