I was 18 and my mother sent me to my Granddad's house to check how he was, a regular visit.
My Granddad was in his 60s and was widowed many years before when I was still a child. Mum kept tabs on him and recently delegated the task to me, more and more.
He never exhibited any signs of health issues and was fun to be with, so I was glad to do it.
On this day, he was in his boxers when I arrived and he offered me a seat on the sofa and a bottle of lager.
"I was just watching a porn film and planning to masturbate, I don't suppose you need to do that with all the young girls." He said. "How many girlfriends do you have?" He then asked.
"I don't have any." I replied.
"Really, let's watch together and share the experience." He suggested.
We both stared at the TV screen, which was receiving a feed from the laptop and Granddad was stroking his cock. I did the same but half-heartedly embarrassed somewhat. Soon his cock had become fully erect and mine had perked up a little but wasn't really erect
"I'd have thought you would have been much more aroused by now, look at my geriatric hard on." He said proudly.
"You've got a great cock; I must've taken from the other side of the family." I said.
"Let me help you with it." He offered.
I let him take over and I did become stiffer, mainly because of him rather than the porn.
"Granddad, I have to tell you something. I fancy men. Whenever I pass them; on the street, in the gym, wherever. I've even thought of paying." I confessed.
"Well that's a disappointment but you're my grandson and I will always love you. Do you know about gay couples and how they work?" He asked, taking his hand back.
"Well I know that they suck cock and fuck up the bum." I replied."
"Yes, well gay roles are similar in a way to normal couples. There is the 'top' that is like the male and the 'bottom' assumes the female role. Each role can be by preference or size of the cock. You should be careful and know what you want." He said, surprising me how openly he was speaking.
"I have thought that because of my size, I would be the 'bottom but I also think it is my preference'. I said.
"That is probably right, would you be happy with that because gays can be brutal and your hole may not be able to take the hard fucking." He said.
"I have thought about that and how to find someone who will begin gently." I replied.
"Hold my cock if you like, squeeze it, rub it and do what I was doing to you." He said.
I did just that and said. "I would have liked mine to be as thick, long and hard, it's a lovely specimen."
Your granny never complained and none of the women I've fucked since she died or the prostitutes I pay now either." He said proudly. "You're doing really well boy, ooh you are really enjoying that. How about going to the next level and put it in your mouth."
I stooped forward and licked as I wanked him off. He put a hand behind my head and leant back. "You're a natural cock sucker boy, do you like that?" He asked.
"Yes granddad. You taste good and I'm glad I told you first." I replied.
"Kneel and look at me in the eyes as you're sucking me off boy." He instructed.
I was straight down and began to really get excited as our eyes met. Looking at granddad, his eyes kept closing as he moaned and I knew I was doing a good job.