Correct, but there is also a female version that is used on some computers to power the monitor. I searched around more and found a picture of the female version.

[Linked Image from panelcomponents.com]

The benefit of these is that the slots are tiny and all the contacts are shrouded - so by the time the contacts touch, the entire thing is covered in plastic. All we would need is for someone to develop a shuttering mechanism.

Would be great for extension cords...