I have walked in on several people while in the act. I would have to say that the experience that turned me on the most was walking in on my room mate in the barracks. My room mate was much older than me, he was in his early 30s at the time, white guy, brown hair, with a military porn stache, 5'8 compact built, heavy country accent from a coal mining town in West Virginia (he went by "hill billy" It was very common for him to walk around in the nude in our room. He was very confident and had a care free nature about him. He had a nemesis within our unit that he did not like. It was really a matter about being competetive and trying to be better than the other soldier. They both almost came to blows in one occassion. The time that my room mates nemesis left on a month training, it took Hillbilly no time in conquesting his enemies Korean wife. The night I walked in on them the lights were on and it was evident that both Hillbilly and his enemies Korean trophy wife were not all there. They paid no mind that I had walked in. Hillbilly made eye contact with me and gave me a deviant smile from ear to ear. The Korean wife was very good looking, nice full natural red nipple pair of tits. She was young in her early 20s. Her pussy was very small, hairy and tightly delicate. I got to pound her on some occassions later during threesomes. They were both fondling each other. Hillbilly was a genetic stud, he had to have had a testostorone issue because he overproduced it naturaly. Hillbilly had a very musky stinky odor about him, big fat feet that smelled. His cock was a pasty white color, big red darth vader looking head. His cock looked angry from all the veins on it. His balls were the biggest red balls I have ever seen on a guy. That made me partly believe that he produced plenty of testostorone. Both of them acknowledging my presence continued their course. The love making was very gentle that first time. Hillbilly was packing too much for her tight cunt. The size of his cock being not that long about 6.5 inches but the girth was 8 inches at the top end and about 9.5 at the base. Yes, very girthy. His cock was too much for het. It was night after night Hillbilly breaking in his foes sluty Korean wifes pussy. I got to vouyer and watch almost every encounter between them. By the end of the month Hillbilly had intentionally destroyed his nemesis wifes pussy. It was the nicest walk in experience I had.