As a teenager I did not have much privacy at home for masturbating, as I shared a room with my sister. I usually had to wait for opportunities when I was home alone. As the frequency of my masturbation grew, I turned to using the toilet as a private space to rub myself.
I discovered that if I was horny and needed to pee, I would get really aroused if I slipped one leg out of my jeans or panties and sat on the bowl facing the toilet like a guy does. Straddling the bowl forced my legs wide open and made me feel sexy. I would finish my pee and then rub myself until I came. This stimulation gave me an orgasm quite quickly. In summer I found that lifting the seat and sitting directly on the cool porcelain was very erotic, as I would get the cool shock on my bottom when I sat down. I would sometimes do this if I was bored and not horny, as sitting like this on the cold china got me aroused quickly, so I could make myself come.
I have continued to masturbate like this into my adult years even though I enjoy a regular sex life. Recently this has been given a new twist. The place I work has grown in staff to the point where there are not enough female toilets. To overcome this, the management has assigned a small set of the men's toilets as female only. It has two regular cubicles and one urinal where men pee. The urinal is one of those egg shaped types that is mounted on the wall, coming out like a basin to pee in to. Oh joy, oh joy, it is made of white porcelain. As soon as I saw it I had an automatic response with a tingle between my legs. I now stay back a little later until the office has cleared of the other women and pay a visit before going home.
I basically do the same thing each time. I remove my panties, pull my skirt up out of the way, open my legs and slide onto the porcelain. It is just deep enough to rest my behind on the outer edge. I find this even more erotic than the toilet bowl, because it is especially for men. If I don't sit, I just kind of squat over it and I've found I can pee into it like a guy quite successfully. I lean back a bit and tilt my pussy forward. Putting my hands at the top of my pussy lips and stretching them upwards, angles the stream more forwards. When I finish this I am so horny I rub myself furiously. I have a very intense and long orgasm.
I don't know what this erotic quirk is, but I suspect it stems from my early masturbation development in the toilet at home. Does anyone else get a kick out of masturbating in toilets?