As a young adult in college I played baseball. I was a second baseman and my best friend, Logan, was our pitcher. One night after a terrible loss of a game the team was in the steam room recuperating. While a few teammates got up and left together, my buddy and I were sitting next to one another as we usually did.
I was babbling on how good everyone played even though we came out on the losing side. I had leaned back with my eyes closed relaxing and didn't even realize we were alone.
I opened my eyes and when I looked toward Logan, I saw he was staring directly at my crotch.
He instantly averted his gaze but I had already realized and looked down to see my towel wasn't covering everything.
I laughed, readjusted my towel and asked "Did you like the view?"
He laughed in return and gave a typical "my bad" like it was an accident.
I just laughed a little under my breath and attempted to go back to relaxing but I couldn't stop thinking about it. Things like this had been happening for some time and as I sat there I was starting to add all the times up in my head. I was starting to think my friend was gay. I had a few other friends outside of sports that were gay though and they were nothing like Logan at all.
I continued to ponder while sitting next to Logan. Thinking about the subject was making my cock hard. Not a full on erection, but it was growing enough that I started to feel the towel I was under. I peeked my eyes open slightly and saw that he was staring at my crotch again; even more intensely than before.
I opened my eyes fully and looked right at him and half blurted "are you gay dude? cause it's ok if you are!"
He eventually cuts my stuttering off with a calm "nah dude, you know I'm dating Viki now right?"
While I knew that was true I also knew my catching him checking me out wasn't in my head.
I pretended I didn't know and congratulated him but then immediately asked him "Are you bi?"
He laughed and made a joke, "you wish".
At this point, we had both sat up and engaged fully in the conversation and I realized he's gotten a hard-on and while looking down at his crotch replied, "heh, I think maybe you're the one doing the wishing".
He sees I'm looking at his crotch and he looks down completely surprised that he has a near full tent pitched under his towel.
He slightly stood up and adjusted himself and laughed "you got me thinking of how hot Viki is, that hot body of hers got me all horny".
I continued to mess with him more and started bringing up other past awkward moments that we'd never spoken of. This went on for a while of us joking around with one another. Initially, it was typical "straight guys talk" about being gay with one another.
At some point we got so silly with it I was hovering my hand over his towel saying "I'm not touching it. I'm not touching it" until suddenly after a quick back and forth of my "I'm not touching it"; he replies "You're gay if you do" as he stood up causing my hand to stroke right across his shaft and even bumped his balls too.
I jerked back and shouted, "Shit, my bad dude".
He just grinned for a second "it's all good" and sat back down after rewrapping himself in the towel.
It was quiet for a few before he said laughingly, as to break up the harsh silence, "You know, I know you're thinking about it, so I can just touch yours once and then we'll be even and it'll be over".
I laughed like it was a joke, but was still suspicious as I leaned back saying, "go for it buddy".
Nearly before I was finished speaking I suddenly discovered Logan had reached his hand under my towel and grabbed hold of my shaft. I didn't even realize I was still semi-hard. My cock began to feel a rush of blood engorging it further and I was frozen. I wanted to tell him to stop, but it felt so amazing having my cock in someone else's hand. It had been a while and was never by a guy.
When Logan saw my dick getting bigger he said, "See you're the gay one. Look how hard you're getting!"
I replied, "you're the one that has a cock in your hand though".
He let go and we both laughed, until eventually the moment passed and it was time to head home.
We continued this form of play for months while escalating the naughtiness of our actions. We convinced one another that we weren't gay because at the time we both had girlfriends. It wasn't immediate either, but as it progressed it became more frequent.
It finally escalated to something else one night when Logan came over to my house to study for a test.
We were in my room half-studying and half-bullshitting about college drama when Logan got a text. He opened the text, made a strange face and locked his phone as he tossed it back onto the bed.
"What's up Logan?" I asked.
"Viki just broke up with me! Well looks like we'll be hanging around some more!"
"So long as you don't want to fuck me like you did her I guess it's fine", I replied.
"So groping each other is where we're gonna draw the line?", he sarcastically asked as he leaned back on the bed and casually put his hand on my crotch through my pants.
We had continued grabbing/groping each other's cocks on occasion as mostly a joke, but each time got a little more real. This time my dick started to get hard as soon as I saw his hand moving toward me.