Some people do find that having multiple partners detracts from the intimacy in their relationships. But, other polyamorous people find that being in intimate relationships with multiple people creates more intimacy due to the vulnerability and communication required.
Can only one partner polyamorous?
My short answer – yes, it is possible. However, to make a polyamorous /monogamous relationship work takes partners who are secure in themselves and their choices, secure in the relationship, good communicators and willing to work.
How does a poly relationship work?
Polygamy is being married to more than one person at the same time, whereas polyamory involves both married partners having the freedom to have relationships outside their primary relationship. Some relationships start off as being polyamorous, whereas others may become polyamorous after being together for a while.