I've never thought about myself as attracted to women, though, I've caught myself thinking about my friend's pussies or breasts..
I was 15 when it happened. It was the summer before ninth grade, so I decided me and my best friend, Sara, would have a sleep over, before school started. We were in my room, gossiping, and I don't know how the subject changed to who in our class we believe masturbates. Then, we got to Sara, and I quickly said no, and she looked at me and said 'Why are you so sure about that?'. I blushed and asked her 'Well, do you ?' She nodded. I felt a little aroused by then; just thinking about Sara in her bed, late at night with her hand in her panties, sent me over the edge. Then, she asked me if I masturbated, and I said 'Well, sometimes'. We avoided the subject for the rest of the night.
At four in the morning, we went to sleep. I couldn't sleep, I just kept on thinking about Sara masturbating. I checked if she was asleep, and I made my way to the bathroom. I had my own bathroom, because my parent's bedroom was downstairs, and they thought it would be stupid whenever I needed to pee to go downstairs and then come back up. I quickly closed the door, and I lay on the cold floor, stripping off. My pussy was begging for attention. I started pinching my nipples hard, thinking about Sara. How would it be, if right now if she'd masturbate on my bed that very moment. I started rubbing my clit, letting out a soft moan. I didn't care if she heard me, I would tell her I was sick. I continued rubbing, fastening my pace, I inserted a finger in my vagina, and started going harder and harder.
I heard a movement next to me, and I opened my eyes to see Sara standing in the door way. I couldn't stop then, so I continued rubbing and thrusting, furiously. I looked at her, and I saw her hand was deep in her panties; she sat down, and took her clothes off, and started masturbating right before my eyes. I was so aroused by this, that I could feel my orgasm build up. (Man, I'm getting wet just writing this) I heard her moan and gasp and soon her whole body began to shake. I saw she couldn't hold it longer and neither did I. I screamed as I orgasmed, and I was soon followed by her screams.
Feeling bolder than ever, I made my way to her, and started kissing her breasts. I stroked her all the way to her pussy. I looked at her, as I started pinching and rubbing her clit. She was tossing and moaning. She pushed me, and started fingering me, and soon we were in a 69 position. We started shaking and orgasmed at the same time. I went for the shower, and she came with me.
Well, what happened in the shower.. that's another story.