I have very clear memories of this. I had been on a few websites such as Gaydar and Squirt for a while chatting but had never plucked up the courage to actually arrange a meet. I was chatting to a guy one morning (he was in his late 40s / early 50s) and in a moment of bravery, arranged to meet to suck him to completion - nothing expected in return. A little bit of wasteland / greenery about 2 minutes from my house was decided upon as a safe location and I got there around ten minutes early and wandered about keeping an eye open for the guy.
I wasn't waiting for long, I saw a car pull up in a layby just by the entrance to the field I was in and the guy got out, saw me straight away and walked towards me. I was so fucking nervous as he approached and nodded hello. He asked where was best and so we walked for a few yards towards some scrub and bushes. I pointed and asked "how's this" to which nodded in approval and, behind a bush within some long grass, I got on my knees. As he walked towards me, he was already undoing his fly and pulling out his semi. I opened wide and he put it straight in, no messing around. I felt it grow full on hard in my mouth and he immediately grabbed the back of my head and started fucking my face pretty hard. He didn't last long - I expect he'd been edging for some time whilst we spoke online - but I definitely felt his thrusting get more urgent and rough. He muttered something like 'sorry, gonna cum' and a few seconds later, yanked my head so hard onto his cock that my first concern became trying not to choke - it was pretty much halfway down my throat. He was grunting and practically snarled as I felt wet heat in my throat and he emptied his bollocks into it.
He pulled back and zipped himself up, once again apologising for not lasting longer, then just walked off back to his car and fucked off leaving me to process what had been done to me. Admittedly, I did cough up most of his load and spat it on the floor but yknow...first time and all that. Still makes me horny thinking about it. I was due to go on holiday the next morning with my then gf and honestly, I wish I had told her about the encounter!