I was 13 when my grandma taught me how to bake cream puffs. Puffs are these round, hollow and slightly crispy pastries that can be filled with cream. I was an eager teenager housewife and she was an experienced baker. Nevertheless, the first round of puffs turned out a failure. The puffs did not rise, the dough had been too hot. That day I learned that some recipes must be followed to the letter, else it will not work.
When my boyfriend finally returned from Africa in 1989, two years of intense letter writing came to an end. I had written about my life as a budding researcher, he about his life as a volunteer in the bush. Still I became a bit puzzled the morning of our reunion in Paris, when he after a night in a cheap hotel bed announced that he had dreamt that we were competing peptides in the HLA groove!
Although I am an omnivore, I must have dairy butter on my morning sandwich, otherwise I lose my appetite. Similarly, the Norwegian dulce de leche type spread “Hapå” is according the Nestlé advertisment an effective means to get the kids to eat their sandwiches.
The macrophages behave a bit in the same way. They eat everything, but it helps a lot if a bacterium is covered with “Hapå”. It then goes down a lot faster.