Putting unbuttered bread directly into a toaster is perfectly fine, and it is a common way to toast bread. The toaster's main purpose is to heat the bread slices and make them crispy by toasting them. Buttering the bread before toasting is an optional step that adds flavor and a different texture to the toast.
If you choose not to butter your toast before putting it in the toaster, here's what happens:
Toasting Process: The toaster will heat the bread slices evenly, causing the moisture in the bread to evaporate and creating a crispy and slightly browned texture. The bread will still become toast, just without the added flavor and buttery goodness.
Texture and Taste: The toast will have a dry and crispy texture, which some people prefer. When you butter the toast after it comes out of the toaster, the butter melts into the bread, enhancing its taste and providing a smoother texture.
Customization: By toasting the bread first and then adding butter or other toppings afterward, you have the freedom to customize each slice according to individual preferences. Some people may prefer butter, while others might opt for jam, peanut butter, avocado, or any other spread or topping.
In summary, buttering your bread before toasting is a matter of personal preference. If you like the added flavor and moistness of buttered toast, then go ahead and butter it before toasting. If you prefer the simplicity and dry texture of plain toast, toasting the bread without butter is absolutely fine. Enjoy your toast however you like it best!