Only when neither of you haven't had sex for a while, due to work or pregnancy, you come to realise what is it that you miss. First, it's all those details you can't perceive when yourself are fucking your wife: when the black guy lifts his head and you notice his balls get full and hard and his cum is about to gush into her pussy and her nipples get big and hard too, and you know they're in sync - other than you cumming earlier than her or not arousing her much after one hour of hard exercise. And you see that happening, he growls and his balls jerk all that stuff into your wife's reproductive system and her moaning changes too, she starts rubbing her boobs and nipples and you know they both cum. His balls go up and down and his shafts swells and pulsates, while she curls her toes and soon her legs start shivering. Second, it's when their sweaty bodies clash at the end of their *******, and relax and their lips kiss. And you to yourself mixed with a strange sense of pride and envy, that's my babe! And he is another guy, different from her and from me...