The college friends' conversation took an unexpected turn when one mentioned his brother's sexuality. Seeing an opportunity, I proposed a 'check-up', and the straight friend eagerly agreed. In the dimly lit room, I began my 'examination', my professional demeanor belying my growing arousal. I ran my hands over the young man's toned body, his skin prickling with goosebumps under my touch. His cock twitched as I explored his chest, his abs, his thighs, until I reached his groin. He gasped as I wrapped my hand around his cock, his hips bucking slightly as I began to stroke him, his gay desires finally coming to light in this unexpected medical encounter.