Double Backing

IS IT OK IF YOU SLIP UP AND GO BACK AND HAVE SEX WITH YOUR EX? IS IT OK TO HAVE SEX WITH AN EX? CAN YOU HAVE SEX WITH THEM AND NOT CATCH FEELINGS ALL OVER AGAIN? IF YOU WERE REALLY IN LOVE WITH AN EX AND YOU TWO SEPARATED AND THOUGHT YOU WERE OVER THEM WHAT HAPPENS WHEN YOU SEE THEM WITH A NEW PARTNER FOR THE FIRST TIME? HOW DO YOU FEEL? WHAT WOULD YOU SAY IF THEY INTRODUCED THEM TO YOU? ARE THERE ANY EXES YOU'VE HAD THAT YOU WOULD WANT TO GET BACK WITH? IF YOU GOT OVER A PAST LOVE AND WERE JUST MOVING ON WITH YOUR LIFE AND THEY CAME BACK TO YOU, COULD YOU ALLOW THEM BACK WITH OPEN ARMS?