One thing some people have is jelousy issues. we dont own each other. but we allow one another to explore our hottest deepest sexual desires. and if done SAFELY and with agreement of all parties then I see nothing wrong.
I care about my wife DEEPLY and wnat to let her experiance life and NOT be stuck in a humm drum life. We sometimes forget that and fall into a rut. To some people it is a real turn on to see their pasrtner getting pleasured by another woman or man or 2. The combinations are endless as are the games and scenarios. We have met politicians to school teachers to PTA moms. lol
you would be surprised. you are only limited to your imagination and inhibitions.
Some people feel like they will loose their partner for a better piece of ass. Well that can happen but is very rare. its just SEX nothing else. and its not like most people will hop into bed without getting to know ya first.
but thats always usually the main goal.