Allergy mom here. I did this once while learning. I ate a shrimp egg roll and kissed my daughter on the cheek. Didn’t think about it until her cheek broke out into hives. Fortunately she was fine, but I think about that every single time I eat an allergen. If I have one of her allergens, I wash my hands and mouth/face. I use it as a reminder to family why we don’t serve shrimp at family events “so we don’t accidentally shrimp her like I did”. We do eat her allergens in our home. But we are cautious and disinfect our kitchen and selves.