Like Father, Like Son.
My son David was born when I was 20, and his Mum and I divorced when he was 11. I had always been Bi, but this wasn't the reason for the split; we had just grown apart. In time it had all become reasonable, and everyone got on well.
David lived with me during the week because it was easier for school, and he had friends nearby. His weekends with his Mum fitted my bi social life, so it was all good. We're a pretty open family, but there were some things best left on the quiet. I'd had a few straight and gay relationships over the years, but none of them serious, and very few had been introduced to David, though I was sure he was aware as he got older that some of the guys were more than friends. His mum had remarried and had two other boys and family times were great.
David and I were always very close though, and I always made sure he knew he could talk to me about anything. I've been with enough guys to know I bat well above the average, nothing scary big but enough to strike comment. I'm a grower though and remember being shy as a lad, even teased. One girlfriend had described it as "the most amazing erection" she had ever seen.
Over his late teens, David had a few girlfriends; I knew things were going on and took the view that I would prefer they had fun in a clean, safe bed than some dirty alley. We had talked about it, all the embarrassing chats with him going, "Oh Dad! That's gross." in the embarrassed way kids do. I'd made sure he understood the pros and cons of safer sex and that had condoms and things available. There were also a couple of lads I was a bit suspicious of; one in particular, had stayed in the spare room a couple of times, but it didn't look much like the bed was slept in. Anyhow, his experiments were his to have and not really my business; who was I to judge?
So, David was finishing college, looking to go to university and living with me pretty much full-time. I was having a piss one night before bed; I have an ensuite but don't like to use that toilet. So I'm butt naked, just about to leave the bathroom, and in walks David. He's seen me nude loads of times, but this was different; his eyes lingered on my cock then he looked up, embarrassed. "We OK?" I said.
"Yeah, just errrr." He said with a laugh.
"Sorry, a bit of a semi-on." I laughed it off, we went our ways, and that was that.
A few months passed, David turned twenty, and I noticed that he wasn't himself. He seemed a bit down and quiet, clearly something on his mind. I asked a few times if things were OK, if he had any problems at College, or if he was worried about his last exams, but I got a standard teenage "I'm fine."
A few weeks on, and I'm walking past his room to mine, the door is quite open, and he's lying on the bed holding a full-on hard-on. "You need to learn to close the door." I said nonchalantly as I passed.
"Just checking the size." He shouted back. I laughed out loud then he called back, "Dad, do you think it measured up?"
I was in my room by now and just called back. "Looked big enough to me."
"Yeah, but it's not like yours the other day. That was massive." He said.
"They're pretty similar, mate." I retorted but intrigued.
"No, I think you're bigger." He said, opening up. "Honest Dad, I'd like to know. Some lad at college was taking the piss out of me in the changing room the other week. Saying how I had the smallest cock in there."
I walked back to his doorway; he was still lying on the bed but not doing anything now. "Is that what the last few days have been about?" I asked. "He's just an idiot and probably insecure about himself, so putting you down to make himself feel better. Honest, most guys are pretty similar when it counts. I wouldn't get hung up on it."
"Yeah, but I think I look smaller." He said, and I could tell he was really bothered.
"In the changing room? Well, half of that will be the angle of the dangle. The way you're looking at it from, like, down on it, and the other half will be how much of a grower you are. Seriously, I'm sure you're decent." I encouraged. It was all a bit blokey but I was wearing grey joggers and I could feel myself growing with all this dick talk. I walked over, pulled my cock out and waved it at him in a really laddish way, going, "Weyyyyy haaaaay!"
"See, it's miles bigger." He snapped.
"It's honestly not." I said as I put my dick back in my joggers. "It's just perspective."