It's kind to give what you have to others.
Marvin caught and cooked more crab than he could eat.
Marvin wants to get rid of the extra crab.
Marvin knows his neighbor has nothing to eat, so he gives his neighbor the crab.
Marvin knows his neighbor has nothing to eat but throws away the crab in the garbage.
Marvin's neighbor does not go hungry.
The food is wasted and Marvin/s neighbor goes hungry.