Four couples, a hot and horny couple vs. a secretly horny couple, a middle-aged pervert couple vs. a newlywed couple who want to have sex, swap partners and have sex right in front of each other. They suck and insert other men's dicks in front of their wives and husbands, get excited watching and doing it, and their hips move on their own and they moan with pleasure that they can't get from normal sex.