At the time I had just turned 18, my uncle was 40. I would go over normally to his house to swim with my cousins and be there all day til nighttime. One afternoon I walked over to his house to use the pool and my cousins had left to the mall, my uncle had dropped them off. When I got there I found my uncle in the pool by himself and kinda startled to see me. I asked if I can get in and he was kinda hesitant but said sure. It wasn't til I jumped in that I noticed that he was skinny dipping. I joked with him about him letting his junk float freely, he had a nice 8in cock and girthy. He laughed and said I should try it sometime. So I immediately took my trunks off and we continued to swim, joke and talk. I had never seen him in any way hint that he was attracted to guys do I didn't think anything of it. He gets a call from my cousins asking to pick them up so we semi dry off and go inside to change. I grabbed my trunks that were dry now from sitting in the sun and walked inside still naked with my towel around me and he followed closely. When I got to the sliding back door he hit my butt and said "hurry up!" jokingly. I turned and said dang, hit my ass hard enough, my towel almost dropped. He then laughed and pulled my towel off while I was walking through the hallway. I tried to cover up quickly and he laughed saying, please, like I haven't seen everything already. He said look, I'll take mine off too, better? I turned and had to look down at his thick cock swinging. He immediately noticed that I looked down and seen my eyes get wide and he asked had I never seen one before and laughed. I said no, not that big. He laughed and I asked if I could touch it. He agreed almost immediately and I walked towards him and put it in my hand and just held it. It has nice weight to it and it was thick. I slowly started stroking it in my hand and slowly started getting closer to it acting as though I'm inspecting it. He was moaning louder and louder when I noticed his eyes closed I got face to face with it on my knees. He opened his eyes and looked down at me and said to open up. So I opened as wide as I could and I felt his warm cock slide on my tongue, filling up my mouth and hitting the back of my throat. He said "ohh fuck! You have a nice mouth" and he started pumping in and out of my mouth. I slowed him down so I cold attempt to deep throat his cock as much as I could and he said "oh you want it deeper?" grabbed my head and began fucking my face and pushing his cock passed my throat barrier and before I knew it his balls were slapping my chin. He pulled out and was about to cum and I closed my eyes as I heard him moan then I felt a strong rope of cum hit my face and a few more after. I got up and laughed amd he was just smiling saying how great I looked with his cum on my face. I looked in the bathroom mirror and he covered my face nicely. He cleaned up and went to get my cousins as I stood there admiring his work before I washed it off. Best experience ever with a man to this day.