They say they communicate, but a new survey by Fidelity suggests otherwise
                                
                                
                                    (Newser) -
                                    For richer, for poorer, for who knows? Nearly half (43%) of couples in serious relationships don't know what their partners earn. And of those, 10% are off by at least $25,000. So finds the latest biannual online survey by  Fidelity , which polled 1,051 couples who are at...