Well my fiancés best friend at first jokingly asked me if we could set up a wife swap ! Then it turned into a real question... him and his wife married at 19 yrs old ( she got pregnant ) neither one of them have been with anyone else . My fiancé has never had meaningless sex before . So I brought the subject up to him , he said " thats sounds ok i guess " and he is sticking to it that he's OK with it and the other couple are all excited about this... should I be worried about anyone getting feelings or the friendship getting messed up ?