It was my girlfriend that brought home the old mirror. She said she inherited it from her grandmother, just another thing that wasn't in the will and no-one knew what to do with. Our bedroom ended up being its temporary home until we could get it appraised by someone who knew antiques.
It was one of the tall ones where you could stand in front of it and see your whole reflection looking back at you. I was alone and bored one day staring into it the first time the thing happened. First it was just my usual reflection, me standing there in my slacks as I buttoned up my shirt and got ready to drive into town.
I'm a tallish, lean kind of guy. I'm not really that muscular but I'm not really skin and bones either. I was looking at my hips and remembering a fantasy I'd had since I was a teenager, when suddenly the me on the other side of the mirror started to move. Normal reflections move obviously, but only as the things they are mirroring do. This time, the other me moved on its own, and it moved toward me.
I was startled at first, so much that I jumped backward and nearly tripped on my own feet. Shaken but curious I watched the me from the other side step through the glass and out of the mirror.
My heart was racing, I'd completely forgotten about the buttons at the bottom of my shirt and instead I was just staring in awe as I stood before myself, the other me looking just as confused as I was.
"You're me," he said, "and this is ..." he looked around at our bedroom trailing off. Questions overwhelmed me as I watched him.
"This is my ... this is our room," I said. My mind was already dredging up every sci-fi scenario I'd thought of in which there were multiple versions of myself.
"What's the first thing I would do if there were several of me?" I thought, and that's how my mind looped back to the fantasy I was having when he first stepped through the mirror.
I looked up at him and he looked back at me.
"You are thinking ..." we both said at once, "no you first ..."
We each paused at the same time to let the other speak. After a short silence he started walking slowly toward me. I sat down on the edge of the bed as he approached.
"Surely, he's thinking the same thing I am," I thought. "He's me and he's" My gaze drifted down toward his crotch and as I expected I could see the outline of his penis through his pants. He stood a foot away from me, smelling just like the shampoo and deodorant I had just used.
I felt my cock bulge with arousal as he put a hand on my shoulder and looked down at me. My hands shook as I reached out and unzipped his fly reaching into his pants and feeling the smooth skin of his shaft against my fingertips.
My heart was pounding and I could see his elbow quivering as I pulled his fully erect dick into view.
"Apparently it is possible to be nervous in front of yourself," I thought as I held his cock in my hand, the smell of it filling my nostrils as I stared at its veined surface. I pressed my lips to its tip and tasted salty precum.