I personally have an allergy to pork products, and have known about it since the 4th grade. My parents and I had NO expectations that others would have to alter their lives to accomodate my allergy, I just learned to say “no thank you” to many many many offers of food. Now the smell of cooking pork nauseates me, but I am surviving quite well, thank you, though I still miss bacon!
I have a co-worker who is allergic to all members of the allium family. No onions, leeks, garlic, anything like that for him. If any of us have onion on our sandwich/in our lunch, he has to leave the room to prevent a reaction. Most of us try to avoid bringing onion but that is wholly voluntary. He has NEVER asked any of us not to bring the food, just warn him if there is some in our lunch.
The smell of turnip greens cooking make me projectile vomit almost as soon as I smell it, Fortunately, my wife doesn’t cook any. Have to move out of my apartment with roommate once for a week for the smell to go away.
I had told him and he agreed NOT to cook any BEFORE I agreed to be his roommate. One week later, I came home from work and Burrrraaapp! Told him if it happened again, he would be on his own.
Fortunately, I can still eat bacon.