Surprise Toilet Turn-on

We share a bathroom with another office. Yesterday I went there and barged open the door. A girl screamed (a little) and before I shut the door, I saw her her sitting there, legs together, white fleshy thighs and skirt below her knees. Elegant hands holding a magazine. Lovely blond hair. I'd never seen her before.

I quickly closed the door and went back to my office above the bathroom. My heart was pounding. The image of her sitting there returned again and again. I thought I remembered hearing a little tinkle, as I opened the door.

I realized she was still below me in the bathroom, white thighs, skirt pulled down...perhaps her heartbeat returning to normal, her body relaxing, and a stream of pee shooting into the little pond of the toilet bowl. I began to get hard.

I heard her below, flushing the toilet. I imagined she had stood up, briefly exposing her pussy (was she shaved, or a furry blond) before pulling up her panties. Perhaps she had changed a tampon or a pad. I heard the door close and she went out to the hallway.

I was completely hard by now, and impulsively unzipped my pants and stroked myself. I came in under a minute-a little messy, but not bad. I was amazed at how hot that had made me-I mean, I've seen my gf on the toilet plenty of times.

A couple of hours later, as people were leaving for the day, I began to get turned on again. I went down to the toilet and jacked off, sitting there. I was flushed red, my cock was totally stiff, and I pumped cum hard and far.

When I crawled into bed, it happened again...images of the girl, stiffing cock, quick and hot and hard stroking, and full on orgasm...

Since then I've masturbated three or four more times thinking of what happened....wow!