Why do they call it a "mouse" if it has no tail?

Question

why?!

Answer 1

It has a tail. The cable running to the USB port/mouse port.

Well, you do have wireless mouse but the 1st to be invented was with cables.

Answer 2

Because originally, the mouse's cable was on the other side of the device, looking like a tail coming out the back.  Since it was sloped toward the front, and rounded at the back (for the palm of the hand), it looked like a mouse.

Answer 3

cause it looks like a mouse and the tail is at the front. But now they have wireless (or tailess) mice...