Colin and I had been best friends since grade one, every weekend we would switch going to each other's houses for sleep-overs. We did this until we were about ten years old. After that Colin got really into sports and was away most weekends at football, baseball or soccer tournaments so our tradition kinda stopped. We were still friends at school and we often worked together on projects, but now we are in grade ten. Colin and I were working on a science project together and we decided to go over to his house on Friday night to work on it. I got there around 5:30pm, Colin's sister let me in. She said 'Colin should be home from baseball in a few minutes, but I have got to run. I have to go and babysit next door, my parents are going out for dinner after they drop Colin off, okay?'
'Sure' I said. I went into Colin's room and sat down in his chair and got out my notes. A few minutes later I heard the door open, it was Colin. He dropped his equipment at the door then walked down the hallway to the bathroom. He didn't know I was there yet. I heard him turn on the shower, he had a quick shower then dried off. Then he walked into his room completely naked, he looked really surprised to see me there, and I was kinda embarrassed. He quickly turned round and pulled on a pair of boxer briefs. 'Jeeze I didn't think you were here yet' he said 'Yeah, your sister let me in' I said 'You sure have grown a lot since the last time I saw you naked' 'Yup, I sure have' He said grabbing his big bulge and flexing his biceps, 'What do you think?' he said 'I don't know' I said 'I bet my dicks still bigger though' 'Okay' he said 'How about a bet, loser has to jerk the winner, I could really use a nice unloading' 'Okay you're on' I said.
Colin pulled down his boxers and started rubbing his dick. I took off my jeans and did the same. When we were both hard I found a ruler in his desk drawer and took it out. I measured my cock at nine and a quarter inches long and five and a half inches wide. I passed him the ruler and he measured eight and three-quarter inches long and six inches wide. 'Well' I said 'Looks like I am longer, grab hold' he grabbed my big hard dick and began stroking it up and down, it felt so good. Being such a good friend that I am I grabbed his fat cock and started to stroke it, we stroked each other. I looked over and saw two huge balls bouncing up and down with each stroke, the size of eggs. We jerked each other for another ten minutes then both shot our loads. As you can guess such huge balls produce a ton of cum. Colin shot it all the way up his chest until he was completely covered with it. We went to shower off then decided we should probably meet at his house again tomorrow to continue our 'project.'