HARD lessons in Judo

When I was 11 years old, I started learning judo at the local YMCA. One day while practicing a throw technique I slipped backwards and my partner immediately fell on top of me. He weighed the same as me but when he suddenly came down with his chest touching on top of my chest, one of his knees struck me in the nuts and I felt a jab of intense pain. I just lay there thinking how badly my balls were hurting, gasping for breath, and feeling really humiliated that everyone knew that I wasn't wearing a jockstrap with a cup on to protect my little boy's jewels. But at the same time having another boy lying on top of me felt strangely exciting as this had never happened to me before. And even tho' my balls were really aching, I started to feel some liquid ooze out from the tip of my cock and make a little wetness spot on my underwear. I didn't know it at the time, but it was my first ever precum while I was awake. But I thought I was leaking some pee because of the intense pain that shot through my balls. The other boy got up and didn't have any idea that he had injured me or that he had just stimulated my cock to an erection underneath my judo gear pants. I didn't get up immediately because by now my cock was firmly pointing towards my belly button. My jacket had been pulled open during the throw, so it wasn't covering my crotch and my shooting up cock was exposed to everyone staring at me lying on the ground, all boys since it was an all boys only class. Fortunately, my pants had sort of bunched up around my waist so it was hard to tell that I had a raging hard on. At least I think nobody could tell for sure what was causing the fabric to be so bunched up between my legs. Fast forward to when I was 13. I decided after my 'accident' to always wear a cup so if I was kicked in the nuts again, I wouldn't feel any pain like I had earlier. Because you move around struggling with your opponent, I started wearing a very tight white speedo swim suit on top of my cup to keep everything tight and not moving out of place when I suddenly moved or an opponent moved one of his legs in between my own and made the cup shift left or right. Thing is, the tightness of the speedo suit pressed the cup up against my balls really tightly, so that with every move I made, I could feel the cup rub against my nuts, resulting in a constant semi-hard on, whether standing still, moving, sitting down or wrestling another opponent to win by pinning him down in a tight hold down. One session, after cleanly throwing my opponent, I dropped down and started to try to pin him to the ground. But the tight speedo feeling distracted me and so the other boy was able to reverse out and put me in a hold. I struggled as he tried to pin down my shoulders to score a point, but the pin he used was the one where one of his arms passed in between my legs at my crotch, under my butt (I was flat on my back) and up my back to take a tight hold of my belt. Once he had a firm grip of my belt there was no way I he would release it as he had full control. His other arm was tightly wrapped around my neck and he was breathing very hard and grunting while I struggled fiercely to break free. But he had his upper body weighing down on my chest and his head was buried into one of my arm pits. I tried arching my back and bucking my hips and groin upwards and releasing and collapsing, and at the same time to rock back and forth in order to slip free and break his hold. But all this did was make my groin press with a regular pumping action even more tightly against his bent arm that was between my two legs and wrapped around my butt crack. The harder I tried to escape and twist forcefully to break the hold, the more pressure and friction I felt from the tight speedo and the cup pressing and rubbing into my sensitive groin. And the harder I fought back, the more he seemed determined to press his two arms and head into various parts of my upper body until I would be forced to tap out and forfeit the match to him, even though I had made a clean throw and had scored a full point. But then all of a sudden it happened again, just like the time when I was 11. I started to feel liquid oozing out of the tip of my cock. But this time it was different... I realized that I was being stimulated towards cuming if I didn't stop grinding my groin held tight in my speedo against the other boy's bent arm. Very quickly the urge to ejaculate overcame my will to fight. So instead of fighting to escape, I simply pretended to fight back and gave in to the rising urgency to shoot my load into my speedo covered cup. My opponent must have sensed my change of heart and the reason why I was pushing against him but without the intensity to escape. I saw a grin begin to form on his face and instantly knew that he had me and could do whatever he wanted to me. Since he had seen me getting changed in the locker room before we had started, he knew full well that I was wearing a very tight swim suit underneath my judo gear and so there was pressure from both the stretchy spandex and from his arm. My grunting and heavy breathing to escape his hold quickly changed into grunting and moaning due to rising tension like when jerking off. My breathing became more ragged and gasping, and he proceeded to silently and secretly masturbate me in full view of all the other students by squeezing his two arms together then releasing the pressure and continually repeating this 'thrusting' pressure action. Within a minute I couldn't hold back any longer and I let out a long low groin and bucked my groin skywards again and again as I mindlessly shot my cum into my speedo encased cock cup. Then I collapsed, spent and satisfied, and lay there feeling humiliated and ashamed as the boy suddenly let go of me and whispered so only I could hear him, "You sure like shooting your sperm off into your tight little speedo swim suit, don't you?!" At that particular moment I sure couldn't argue with him.