TWO of course. I *said* it was 30 years ago, and it was an old apartment. I's doubt if it even had ground conductors running with the hots and neutrals.
But, since you brought it up in what I presume was intended to be a light hearted purulent vein, I feel obligated to respond with something relative to a two blade male plug:
****************************************There was a young lady from Natchez, Who chanced to be born with two snatches. She often said, "Shit! Why, I'd give my left tit, For a man with equipment that matches."
****************************************And, though yesterday I made fun of SWMBO for being born without a technogene, and it's true that she sometimes has trouble operating an electric can opener, that's compensated by her extra compassion gene.
She has been helping children and adults with developmental disabilities and learning difficulties for over 35 years, something I sure can't do.
Shameless brag: