As a kid when I was apparently allergic to pork products (turns out, either outgrew it or wasn't, and they're delicious), I always wondered why if there was fast food breakfast meats, other than egg, it was pork, whether sausage or ground into a patty?
OP, could you specify exactly which culture(s) you're referring to? So far this post is just attracting rebuttals from people from various Western countries, denying that pork products have any significant presence at the breakfast table. Thanks!