I’ll never forget the first time I heard my wife talking about another mans cock, there was a guy at her work she said that you could see his big cock running down his leg in his pants (she showed me an approximate length and girth by pulling her fingers together on her thigh with both hands that was much larger than me) and I could tell she had given considerable thought to what it must be like to be taken by a man with such endowment. I was hit with pangs of jealousy (she had recently had an affair but not with him and we had decided to work things out) but also with a hardening cock and wasnt really sure why but at that moment I knew that I wanted to see him slide that huge cock inside her and to watch her get stretched and cum on his long thick cock while he pumped his cum deep inside her. It was the first time I had really had those feelings and it was way before I knew anything about cuckolding and jerked off many times to the the fantasy of it and thought what the hell is wrong with me but didn’t tell her about my fantasies until many years later.