the One with the Skirt

I barely feel embarrassed. And this one is just one of those rare moments.
My friends and I were walking outside Ayala Mall and I figured to go to the bathroom for a while. There were comfort rooms beside a Loading Station. I told my friends to wait for me so I went in the bathroom to the left.
It was very clean and it made me wonder why there weren’t any urinal hanging on any wall of the bathroom. I just went in one cubicle bathed with the clean sight of the room and its silence for I was alone.
Somebody came in and went into the other cubicle.
I was done and went out of the cubicle. Before I go out, I inspected myself in front of the mirror and wondered why there was a janitress coming out of the other cubicle.
A janitress? Maybe she's about to close the public bathroom. I didn't mind her looking at me with hostility.
I went out of the room and found my friends waiting for me outside. Mitch asked me, "Why did you come from there?"
Huh? What is she asking me?
She broke it into me: "You've just gone into the one with the skirt."
Her voice was an epiphany. A disastrous epiphany, I tell you. I felt like shrinking then because I found the door with a silhouette drawing of a man closed at the right side.
And I have just gone into the female's bathroom!!
I have just been into the door with the drawing that had no skirt on.
My friends laughed at me (How helpful they were!!). I invited them quickly to get ourselves (especially me) out of sight for there were a lot of witnesses: the janitress, the cigarette vendor on one side, and even the passengers of the jeepney beside the place saw me went in!!!
Lucky I was alone in the bathroom----that would be a greater humiliation!!!
Next time, I have to consider first if I were wearing any skirt--then, I can really go in and not encounter a janitress who felt like killing me!!