The ”I” in bi

“Hey Dave, care to show me how you wank? Just, you know…to compare?”
“Why, you don’t know how?” he said a little mockingly? He was well aware that he was my social better, and had the nasty habit of gaining popularity at my expense.
But now that we were alone, I felt I could be a little more open.
“It’s just, I do it all the time, but it always takes me a long time to come, you know. Maybe…we could just…I don’t know, wank together?”
Couldn’t believe I let those words leave my mouth. I was sure he was going to scoff and walk away, and tell everyone so I’d be the laughingstock of the town by morning. But he didn’t. He did hesitate a bit, and eyed me a little suspiciously, but eventually just shrugged.

“Sure, why not”, he said, and started unzipping his pants.
I started telling him how I thought my dick was already quite big (I really did think so), but just stopped talking as soon as he pulled his briefs down and let his cock spring free. I hadn’t known what to expect, but certainly not that! His penis was fully erect; a swollen red pole with a throbbing purple head, veins winding around his long and thick shaft. I had only seen an erect penis fleetingly in a porn mag, but never in real, and certainly never up close. Did I actually say wow? I probably did, out loud maybe, but certainly in my mind.
He picked up my admiration – he had probably expected it – and slowly started stroking, grinning.
“OK, your turn, let’s see what you got”
I obliged immediately, opened my zip with clumsy fingers and tried a little in vain to feign the same level of confidence when I pulled out my own cock. I guess I indeed wasn’t that small, but compared to him…let’s just say he was a few years ahead of me in more than just shoulders and interest from the girls.
He grinned once more, but not in a belittling way, and started masturbating with slow and deliberate strokes. I joined in, and we stood there jacking off for a couple of minutes. I couldn’t keep my eyes off his cock, and watched mesmerized how it slid in and out of his fist, his foreskin moving from and over his glans. I increased my tempo, and became aware of my mouth watering. But before I even got close to an orgasm, he started panting and stroking faster himself. He buckled with his pelvis a few times, and with a loud groan he ejaculated, thick long plumes of sperm shooting from his cock, indeed just like he had bragged about.