Do you bring your own munchies?

So to start this off, my spouse and I do not smoke weed. However my brother in law does. He smokes it outside so I'm okay with it. But. Maybe this is just pregnancy hormones, it drives me crazy that he gets high, gets the munchies and eats all my snacks or anything easy to grab that doesn't involve preparation. He never brings his own munchies. And I know you get the munchies with weed but if I'm already supplying your food and dl most of your drink while you're visiting is it necessary to eat everything in sight? Even my baking drawer gets raided. So. What's the etiquette here? Do you or do your friends bring their own munchies when they know they'll be smoking? Or am i being silly?