An idea popped into my head. I'm bisexual, but I hadn't tried jacking off over anyone but Jake since I discovered my transformation power. If I jacked off over a girl, would it mean... I knew I needed to find out. Now.
I locked my door, undressed and found the locked folder on my PC where I kept my friend Lori's nudes. I eagerly started playing with myself as I looked at her cute C-cup boobs and soft thick ass. Sure enough, I noticed I was starting to change. My figure slimmed a bit and I developed her curves and large butt. My skin became smooth and soft all over.
My nipples seemed to swell and when I touched them, I moaned in a high-pitched tone. I continued to rub and pinch and pull them as I sprouted breasts, which were quickly seeming more a part of me than the hard penis between my legs.
I looked down past my new tits to see my already small cock had started to shrink, even if it still felt very hard. I felt a weird sucking sensation inside me- it made my balls tug up into my body and my crotch recede inwards. As my cock became a tiny sensitive nub, something opened between my legs and felt wet. I had a vagina. And when I looked at my reflection, I saw I had Lori's body!
Since I hadn't cum yet, I wanted to find out how it felt to orgasm with a female body. One of my hands continued to play with my boobs, while the other moved down to my slit. I carefully slid one finger inside myself and rubbed over my new clit, and the sensations felt nothing like playing with myself as a guy had. Playing with the sensitive nubs of my nipples and clitoris only amplified it, it felt amazing.
I thrusted in and out of my slit faster and faster, and added a second finger to fill myself up further. Pretty soon, it got too intense and I bit my lip hard to keep from moaning so loud I alerted everyone to what I was doing. I came hard against my hand, and practically shook as I came down from the high.
Apparently I could turn into someone of the opposite sex, then. I wondered what else I could do...