No, it is not recommended to put butter on your toast before putting it in the toaster. Placing butter directly on the bread and then toasting it can be dangerous and may lead to potential hazards.
Toasters are designed to be used with dry bread slices, and adding butter or any other spread before toasting can cause the butter to drip into the toaster's heating elements. This can result in smoke, a potential fire hazard, and damage to the toaster.
If you want to have buttered toast, it's best to toast the bread first and then spread butter on it afterward. The residual heat from the toasted bread will melt the butter and give you a delicious, evenly buttered slice of toast without any risks associated with putting butter in the toaster.