Growing up

I was 15 back then  when I met Julie and Carrie. They were 15 too and went to a private school but I lived in the neighborhood across the street and we soon became good friends.  They usually were at Carrie's house after school and no parents were usually home for a couple hours.   She had an older sister but she was hardly there.   They would change after school and would have me leave the room.   Soon they just put something over my eyes.  Carrie was very attractive and Julie wasn't far behind.   I was very shy and they enjoyed teasing me. One day they just told me to close my eyes so they could change.   I of course peeked and watched as they took off their plaid skirts and white shirts.  Both in bra and panties I got so horny.   Carrie smiled at me as she slid her panties off.   Julie asked her what she was doing?   I'm changing everything and put on a robe.   Julie put on some clothes.  Ok you can open. I was so horny I told them I should probably get home.   Carrie insisted on me staying and went to shower.   I tried to talk with Julie like normal but was unfocused. Carrie walked in her room in a towel and sat beside Julie on the bed.   She asked Julie if she needed a shower.   Not yet, she replied not wanting to leave us alone.   That had been the problem they didn't want to hurt their friendship and I didn't want to either. Carrie randomly asked me if I jacked off.    What?    I played dumb.   She told me that she masturbated.   Julie was in shock but soon said that she did too.   They soon revealed they had done it together a few times. I'm not sure who asked what but soon I was being told how they had never watched a guy do it and wondered how. I said I had never even seen a girl naked in real life.   Carrie took her towel off.   I was so excited and scared.  We agreed on watching each other. Soon the three of us were nude on the bed.   I watched as they rubbed there clits.  I stroked myself coming faster than ever.   They giggled as I shot cum everywhere.   I never got soft before my second time.   I continued stroking as they came.   I couldn't believe what was happening.   Julie came first and as we watched Carrie rub her pussy Julie grabbed my penis.   Oh that's what it feels like.   Carrie asked me to finger her  so I placed a finger inside her and felt my first pussy.    She squeezed my finger as she rubbed her clit.   She sped up so i did too.   Julie stroked me and i came all over her hands.   Carrie came as well.   I slipped my finger out of her and licked my lips.   Delicious I commented. Julie asked me to finger her.    So I fingered her and Carrie rubbed Julies clit.    She came quick.   We lay there a moment then we heard a door.   We quickly dressed.    Carries sister knocked and walked in. Everything ok today?   Yep.   She looked at us like she knew.  You guys look up to something but went to her room.   Her sister was 18 and freaking hot. I knew Carries mom would be home soon and didn't want to be there and told them I should leave.   Wait,  Carrie said as she grabbed my cock and asked if i was ready again.   We all began kissing and hands we everywhere and all came again.    Carries sister was in the living room on my way out.    Sounds like you had fun today.       I was speechless.   I ran home and jacked off again. We did it again a few times the following weeks.    All young and dumb we tried to stay normal but eventually we progressed to things I can't write about here.    But that first afternoon was one of the best days of my life and I still think about it when I'm alone.