It is polite to cater to special needs guests.
Dot wants to invite Skip, who has a number of food allergies, to  her party.
Dot wants Skip to have a good time at the party.
Dot asks Skip what foods he likes and can eat, and makes sure to serve at least one thing he's listed.
Dot doesn't make any attempt to accommodate Skip's allergies with special foods.
Skip has fun chatting with friends and listening to music, and really enjoys the snacks Dot provides.
Skip has fun chatting with friends and listening to music, but leaves early because he's hungry.