Yes, yes :). I was really joking with the 7 pins.

It would be amazing though to make it a hermaphroditic 4 or 6pin connector. With a pinout like this:

  GND TX [VrefTX VrefRX] RX GND

So it always plugs at a 180° rotation, connecting RX to TX. And any cable also rotates 180°. Since you always have an odd total of (connections + cables), you always get the right connection...