Cole didn't come up with any excuse on the spot so he awkwardly followed his friend to the boys' bathrooms without a word, while Aiden went to the cafeteria to save them seats. Cole's semi was starting to tent his pants in a funny way but the boys reached the bathroom soon enough.
"Man, it was too hot in this classroom, I'm glad it was not just me" Sam joked, poking Cole with his elbow and almost hitting one of his boobs. Cole was red as a beet, not used to the situation.
"You do your business, I do mine, we don't have all day", Cole mumbled as he entered one stall, Sam taking the next. He let out a sigh of relief as he closed the door behind him.
Immediately unzipping his pants, he struggled a minute to get his semi-erect cock out. The inside of his underwear was wet with pre. He paused for a second, hesitant. In the next stall, he could hear Sam's pants hitting the floor and the sound of a hand rubbing on skin.
Wow, he was really going at it, Cole thought. His own dick twitched again and gained another inch. He closed his eyes, taking a big inspiration. Suddendly the noise stopped for a minute. Then Cole felt his smartphone vibrate in his pocket, so he checked his messages.
Before his eyes was an explicit shot of Sam's erect penis that Sam had just sent. It was hard to tell the size from a picture but it looked quite developped for his age, somewhere between 5 and 6 inches, with a bead of pre at the tip. Then the text: "you next!".
Cole's eyes grew wide. The sight was making him so hard. He was not used to playing that kind of games with his friends; is that was Sam did with his former group? And now he was waiting for Cole's reply... Cole looked down at his own throbbing erection, which was starting to turn red and growing a knot.
Shit, he thought. Better hurry before it's too late. He held his dick with one hand covering the knot part, snatching a quick picture before his member grew to 8 inches and the glans more canine in nature. Satisfied with the result, he pressed "send", and heard the notification bell of Sam's phone resonate in the bathroom.
As he was starting to wonder if he had made a mistake, Cole heard Sam resume jacking off. Was he masturbating to his picture? Another spasm ran through his cock and a rope of pre escaped him and landed on the toilet seat in front of him. Why was he turned on by the situation so much? He looked at Sam's dick pic again, his balls churning.
Cole carefully put his phone on the toilet seat to free his hand and started smearing pre all over his length, picking up with the pace. The bathrooms were desert at the moment but it might not last. For now though all that could be heard was Sam's heavy breathing and the wet sounds of his jerking off.
Without realizing, Cole had lifted his shirt and had been cupping his small breasts with his free hand while furiously masturbating with the other. When grabbing at his breasts was not enough anymore, he moved on to tug on his nipples. Closing his eyes he could still see the image of Sam's dick in his mind, and as confusing as it was, he started fantasizing about Sam touching his breasts.
On that moment he heard Sam grunting harder and come, which made Cole lose control. Cum gushed forward and splattered everywhere as a high-pitch moan escaped his gritting teeth. He had to hold his member with both hands to keep it from trashing around wildly and direct the geyser at the toilet, his perky breasts still poking under his lifted shirt.
He was still holding his persistent erection when Sam flushed his toilet and exited his stall. Cole could hear his own heartbeart, his breasts heaving visibly with his short breath, hands on his massive canine dick. In front of him, his phone still displayed Sam's cock, with droplets of canine seed splattered on the screen - and everywhere around him.
"Need a hand in there?" he heard Sam ask just behind the door, a laughter in his voice.