I've always held this fascination from the first time I saw it.
Back when I was 16 years old I had a boyfriend who was 17. One Saturday afternoon we were parked in the school parking lot after attending a function earlier that day. We were the last to leave and we ended up making out with each other. We had by then got into some light petting which was his rubbing on my tits through my blouse. On this afternoon, Jimmy (my boyfriend's name) started taking it one step futher. His hand went up under my blouse and finally up my skirt. He got himself so excited and aroused that he started telling me how much he wanted my pussy. I immediately told him NO! He just kept up getting more and more aroused and kept begging me for 'it'. I again kept telling him 'no; no way!'. He then told me 'Julie, I can't take it. I've got to get off. Please'. He then took my hand and put it on his cock and said 'see what you've done to me!'. I told him 'I'm sorry'.
Jimmy then told me 'if you won't give me some pussy the least you can do is give me your hand and you can watch me cum'. By now I too was beginning to feel some sexual excitment with us kissing and feeling each other up like we were doing so I told him 'OK but you're going to have to show me how to do it'. Girl talk and my mother had told me about this thing boys enjoy doing known as 'jerking or jacking off'. The equivalent to our fingering ourselves which I was very familier with. Jimmy said 'I'll be glad to show you how' and again made a big thing about my 'watching me shoot my cum' as he put it.
We then drove to the other side of the football field which was wooded and secluded. Jimmy said 'let get in the back so we'll have more room'. We moved to the back seat and Jimmy wasted no time dropping his pants and briefs and there it was. The first erect penis I'd ever seen. It looked so big. I again told myself 'no way am I going to let him stick that big thing into me'. (have I ever changed since then!) He took my hand and wrapped it around it. I found out later that I was the first girl to ever see and touch him there. He showed me the stroking thing and I went to work on it. He put his right hand on my leg and started rubbing it. Jimmy was so excited that it wasn't 30 seconds and he started saying 'oh Julie, I'm going to cum. Oh Julie, oh Julie. Watch me cum. I'm cumming, I'm cumming!'. I certainly did watch and what a sight it was! I had no idea that it was going to come out with such pressure and I jerked my head back when the first squirt flew out. I was fascinated by what I was seeing! It shot up to his shoulder and the next went to his neck and streams of it were all over the front of his shirt. I knew right then that I was hooked on seeing this. Jimmy finally calmed down and he pulled his pants back up and took me home thanking me the whole time telling me how good it felt.
Here I am now in my mid thirties and I've never got over my fascination with watching boys and now men 'get there rocks off' as I have long since learned to put it. I have always been a real easy 'hand job' to my dates ever since this just so I could watch them cum. Even after becoming fully sexually active and getting married I have always asked my men occasionally to pull out just as they are about to cum so I could see it as they shot off. I'm just so fascinated seeing this as it happens.