It is mean not to consider the feelings of others
Lizzy is cooking for her party, and she knows her vegetarian friend Sandy will be showing up.
Lizzy wants to serve barbecue food.
Lizzy invites Sandy over to her house to make some vegetarian friendly items for the menu.
Lizzy makes an assortment of ribs and chicken wings for the party.
Sandy gains a deeper understanding of barbecue.
Sandy feels left out because she can't eat anything.