A number of years ago I served for 22 years in the Army. Being bisexual, it was incredibly difficult not to let anyone find out as if I was reported I could have been kicked out of the Army. At the time of the following events, I had been married for 10 years and had two lovely daughters, my wife only wanted sex once a month and was not interested in anything even slightly kinky, I used to supplement my sex life with affairs with other guys wives who enjoyed my 8 inch cock, and trips to public loos for gloryhole fun. I had been seeing the wife of a guy I knew for a few months, she was a cockaholic and loved being fucked at any opportunity in any of her holes. I was swimming in the garrison pool one sunny day when Paul and his wife Michelle (the lady I was fucking) arrived, they went and changed and I admired her lovely figure in her swimsuit. Michelle swam close to me and quietly said "Paul is on duty tonight, can you come to our place for some fun?" I said I would try and she squeezed my cock through my trunks. After a good swim and sunbathing I decided to go for a shower, Paul and Michelle were on the way to the changing rooms at the same time. In the showers I said Hi to Paul and we chatted for a few minutes, then he turned away from me and took his trunks off. When he turned back around I glanced at his cock, "Bloody hell!" I said, "they should rename you horse" I said jokingly. His cock was enormous, even soft it hung down long and thick, I then realised he was looking at me staring at his cock and he was smiling, "You should see it when it's hard" he replied, my cock started to harden in my trunks and I quietly said " Should I?" " I think so, don't you?" he replied. He went into the shower stall at the far end and I took off my trunks and went to the one opposite his, I tried unsuccessfully to hide my hard-on but it was obvious i was turned on. He looked at my cock and said "Yours isn't bad either" I didn't know what to do or say, was he trying to trap me or was he bi too? Then my thoughts were answered when he started stroking himself, within seconds he was rock hard and his cock was pointing at me, it must have been 10 inches long and thick too with a huge knob. He was smiling as he said "You can see it better over here". I went to his stall and went in, he closed and locked the door, he took hold of my cock and said "Why don't you kneel down". I knelt without a word as he stroked his cock in front of my face, He held the back of my head gently and slowly pushed his cock into my willing mouth. I sucked him for about 10 minutes before he gasped and pumped his cum into my mouth. He didn't touch my cock again, but simply unlocked the door and said "See you again soon"