toasters typically do have a switch to turn them on and off. Most modern toasters have a simple toggle or lever-style switch that allows users to activate the toasting function when bread or other items are inserted into the slots. When the toasting cycle is complete or if you want to stop the toasting process prematurely, you can switch it off using the same lever.
However, it's possible that there are variations in toaster designs or models that might have a different mechanism for activation. Some toasters may have touch-sensitive buttons or digital controls rather than physical switches, but they still serve the same purpose of allowing users to control the toasting process.
The presence of an on/off switch is a fundamental safety and usability feature for toasters. It allows users to have direct control over the toasting operation, ensuring that the toaster only heats up and operates when needed, and it can be turned off easily to prevent over-toasting or burning. Without an on/off switch, the toaster would continuously heat, which could be dangerous and waste energy.
If you are referring to a specific toaster model or have encountered a toaster without a switch, it may be an uncommon design or an older model. However, the vast majority of modern toasters include an on/off switch for safety and convenience reasons.