As much as Jim enjoyed working out at the gym, part of the reason for going was always for the sauna afterwards. Situated at the end of the shower area in the men's changing rooms, Jim liked to sit facing the door so he could enjoy watching all the numerous naked bodies soaping themselves up.
With only a dim light inside, and darkened glass in the door, he could happily sit naked himself and stare at the bodies without being noticed, and while some didn't excite him, there was generally at least one for him to create a fantasy with while he sweated away in the sauna.
Today was a quiet day at the gym, and in the ten minutes that Jim had so far been in the sauna, there had only been one man that had got Jim fantasizing. Unfortunately, that man had finished showering and gone to get dressed, so seeing no one else to watch, Jim lied back on the bench and closed his eyes to continue his previous fantasy.
A noise stirred Jim back to reality, and it took him a brief moment to remember where he was and realize that the noise was the sauna door opening. "Morning" said the man entering the sauna and sitting down on the other side to Jim. "Morning" replied Jim as he sat up and tried to subtly check out the person interrupting his sauna.
The guy looked in his early 20's and as Jim eyes wandered down his body he grew less bothered by the interruption. While not the bulging with muscles type, the man was athletic and didn't have much fat anywhere on his upper body. Jim didn't care about the legs, as his eyes stopped on the beautiful large cock resting between them.
Jim guessed that it must have been about 5 inches long, and given that it was still soft, his mind started to run wild with how big and thick it must get when erect. Jim's cock was 8 inches when hard, and most men and women were impressed with it, but he could only imagine the pleasure a cock that big would give.
Jim suddenly realized three things: that he had been staring at the beautiful cock for a couple of minutes now; that his own had gotten fully erect; and that the one before him was also stirring into life. Jim watched mesmerized as it first started to grow in length and thickness, then harden with a big head. Jim subconsciously licked his lips in the dry heat of the sauna and looked up to see the man looking back at him.