I believe doing vegemite and cheese on toast at 3am means you're an adult.

You know how to use a toaster.

You have cheese and bread.

You are not double dipping the vegemite or butter.

You can grill the cheese onto the vegemite T and remove it without burning yourself or the cheese.

You're choosing a snack with minimal clean up.

You're wise enough to realise the sodium in the vegemite is likely going to be a good idea after drinks.