Do airplanes have plug outlets

It depends on the model of the plane that you will fly in. Some of them have outlets, but only in the front of the plane. Some of them have outlets on every 3-5 seats, and some of them may not have outlets at all unless it is for the flight attendants to plug in a coffee pot or something. Usually only first class gets the outlets, it is just one of those incentives to pay a lot of money for a first class ticket.