We fantasized and role played alot during foreplay while in college. I am not well-endowed and truthfully have always cum way too soon to give her the kind of satisfaction she craved. We'd play a game while out at dinner or shopping ... one of us would comment on whether a guy was fuckable. But we never discussed going the extra step to make the fantasy and game real. Fast forward two years and we graduated, got married, and moved to a smallish town near the North Carolina coast to start our careers and life together. Totally unexpected, but a good looking high school senior hung out at our apartment pool and within a few days was making small talk with us (her). Stacey was quite stunning - favored wearing a tiny (for the early 80s) black string bikini which he really liked. We started fantasizing about him fucking her - and she got more and more into it. Wasn't long before he was rubbing suntan lotion on her and getting pretty free with his hands and fingers. Started innocently touching her as they played in the pool. Mostly while I watched from our apartment window but at times in my presence at the pool. Eventually we invited him to our apartment to hang out - watch sports on TV, cookout, etc. Stacey and I talked, and at her request decided to let him feel her tits (halter tops and braless summer dresses) and kiss. I watched the first time at their image in the picture frame glass that gave me a clear view of the kitchen. He approached her and they kissed. After a few times, he touched her breasts and put his hand up her dress to feel her panties. She shared the story with me - I told her I'd seen most of it. It turned us both on. Wasn't long before Stacey asked me if I'd be OK if they fucked. I went shopping one weekend morning and left them alone in our apartment. They fucked for the entire year and off and on for a couple of years when he'd return home from the Army. Started us on a 40+ year lifestyle of swinging, cucking and mostly hot wifing.