“The fact is that it’s extremely rare to find anyone who has had only one sexual
partner for his or her entire life. These days, it’s increasingly unusual to
find anyone who has only had one “significant other” throughout his or
her life. So the question is not so much whether to love more than one
but rather whether it works better to have multiple partners sequentially
or at the same time. There are definitely some people who are far better off taking it one at a time, and there are some situations that cry out for other possibilities.”