I was working away from home for a few weeks with Michael, a co-worker of mine.
Michael was 60 at the time. I was 30. We got on OK with each other and decided we'd rather stay in a self catering apartment than hotel rooms for so long so we found a nice two bedroom rental and got the company to book it for us.
I'd always had a thing for Michael since the day I first met him. He was smart, funny, handsome, great smile, sexy eyes, greying hair, kept himself fit, had a lovely butt and an enticing bulge in his jeans. Sometimes his big, hard nipples would be visible through his shirt. I liked that. At work I'd 'accidentally' end up going to the bathroom at the same time as him and had managed to glance at his cock quite a few times. It looked delicious. Long, thick and uncut. It was a struggle not to become erect whenever I got a glimpse of it. Sometimes I failed and got hard but he never seemed to notice thankfully.
Every evening on that trip I would retire to my bedroom alone and masturbate thinking of him.
Imagining what it would be like if he was in my bedroom with me. What would we do together? This was pure fantasy. Michael was straight and married.
I'd stroke myself and wonder if he was doing the same in his bedroom. The thought of his cock spurting his cum over his chest would drive me wild and I'd shoot my sperm as I fantasized about what his would taste like. At this point I'd only ever tasted my own.
After several days we had a day off and went for a hike in the local mountains. It was a hot day and Michael removed his shirt. The sight of his smooth, naked torso made me weak at the knees. I so wanted to start licking his nipples but I had to control myself and concentrate on concealing my erection. He'd probably get mad if he knew how horny I was for him.
After a couple of hours we reached a lake. 'Do you fancy a swim?' he asked me.
I got a bit flustered and said 'I can't, I didn't brink my swim shorts'.
'Same' he replied 'but I'm so hot and sweaty I could really use the refreshment. There's nobody around, we could just skinny dip.'
I didn't know what to say. I was desperate to see him naked but also very aware that if I took my clothes off there'd be no hiding my straining erection. 'You can' I said 'I'll just sit on that rock over there and wait for you'. So I went and sat down. I positioned myself so I wasn't looking directly at him and watched out of the corner of my eyes as he started to undress his lower half. First he removed his footwear and socks. Then he turned away from me and started unbuckling his belt. He bent over as he took his shorts and underwear off and, for the first time, I got to see his beautiful butt. I noticed he had no tan lines. It was obvious this was not the first time he'd been naked outdoors. I could feel precum in my underwear. This was torture. As he straightened up I realised I was staring directly at his ass and quickly turned away.
'Hey' he called over 'are you sure you don't want to swim?' I turned as he called to me and saw him, fully naked, looking at me. I drank in the sight while trying not to stare at his cock and balls. Big, full looking, balls with that gorgeous cock hanging over them. Foreskin slightly retracted. Completely smooth (that surprised me but I loved it). Was he a bit plumped up or was that it's flacid size? Must be the latter I thought. Wow. I'd seen it at the urinals before but seeing it in all its glory made me dizzy. I wanted to touch it so badly. I needed to taste it. 'I'll maybe get in later' I said.
As he walked to the water I was hypnotised by the way his penis swung as he moved. God, I was so horny I thought I would cum in my pants. How would I explain that?
He swam in the crystal clear water near where I was sitting and I continued to watch him while pretending to look at my phone. Then he set off to swim to a small island which meant he was facing away from me. Shamefully I took that as an opportunity to sniff his underwear and the scent of his manliness overcame me. I had to cum and I had to cum soon.
Without thinking I stripped off as quickly as I could and ran to the water. My not insubstantial erection leading the way. Thankfully he didn't turn around. As I entered the water it happened. My cock twitched and started to spurt. I was so turned on that I ejaculated without me even touching it. At least now it might behave itself for the rest of the hike.
Michael saw me in the water and swam over to me. 'Told you it'd feel great' he said. He had no idea how great I'd felt just a few minutes earlier as my seed shot into the lake. He had no idea that seeing him fully naked for the first time had made that happen. He had no idea how much I wanted him. Part of me wished he'd seen it happen but really I was glad to have got away with it unnoticed.
We got out after a while and sat on the rocks to dry off before getting dressed again. Having cum I was able to stop myself getting erect again. He had seemed really comfortable being naked. I liked that about him.
Later, when we got back to the apartment we decided we'd eat in that night. After he'd showered he started preparing us some steaks. He was just wearing a pair of shorts and a tshirt. I was showering when he called out 'nearly ready' so I hopped out of the shower, quickly dried myself and pulled on a pair of loose fitting shorts. No underwear. I hadn't realised how obvious it was until I thought I caught him looking at my crotch. You could see my semi erect cock swinging through the thin material.