I couldn't believe this was happening to me in a dentist's surgery but I wasn't going to miss the opportunity so I pulled away from his cock and asked if was wanted to fuck me. He said he'd love to but he didn't have a condom. I told him that I had one in my jacket pocket -- I never go unprepared! -- so he went over and got it and let me slide it over his beautiful 6 inch cock. I turned round and leant over the dentist chair and, to my surprise, he didn't pull my briefs down but pushed them to one side as he started to finger my hole. He said he loved fucking guys in their underwear and would I mind. I assured him that it was a huge turn on for me too and, after he had applied some lube to my hole with his finger, he began to push his cock inside me.
It had been a few weeks since I had had sex and it felt really tight at first but he certainly knew what he was doing and in no time he was pushing in and out and reaching that spot that made me shout out with pleasure. He whispered to me to be quieter and I tried to control myself. I started wanking my own cock and after a while could feel him getting ready to cum inside me. He let out a muffled cry of 'Oh yes, I'm fucking coming' as I felt him shoot his load. When he finally pulled out I was still wanking and getting ready to cum. He suddenly turned me round towards him and put his face down just as my spurts of creamy cum shot from my throbbing cock. He took it all on his face and in his mouth, all the time smiling and asking for more. Then he took my cock in his mouth and licked it clean before finally kissing me hard on the mouth so that I tasted some of my own spunk.
At last he stood up, looked at his watch and said he was relieved that his next patient had cancelled. Nevertheless he expected another one shortly so he would need to finish. I started to clean up and get dressed and he asked if I always tucked my shirt in my briefs. I said that I did and he said he thought it looked very sexy . So he made sure his shirt was fully tucked in, not just the front that I had done, and pulled up his trousers. I told him that it really turned me on seeing another guy with his shirt tucked in and made sure my waistband was showing as I pulled my suit trousers up. He said how much he liked that too and would I make sure I dressed like that next time we met.
This was music to my ears and I asked if I needed any further treatment. He said that, sadly, he couldn't justify making another appointment, but if I had a spare evening he would love to have a drink with me and maybe more. Of course I agreed and that was the start of several very happy sessions where there wasn't a lot of drinking but plenty of full on sex.. He was now a full convert to tucking his shirt in his and would usually give me a glimpse of his waistband whenever we met. When he finally moved on to another city we exchanged some of our briefs and I had many a happy session wanking in his and remembering the great times we had.