For me, sex is a very important part of marriage. I was not going to marry a woman that I did not have a fantastic sexual chemistry with, which means I had to have sex BEFORE getting married. Once I realized this, pre-marital sex became a must for me. Same goes for living with a woman before getting married. You have to know if the two of you even CAN live together before you decide to spend the rest of your lives together.
IMHO, couples that get married before actually living together and having sex are taking a huge risk with their future happiness. Would you buy a car before test driving it? Would you buy a house sight unseen? Would you parachute out of a plane without inspecting the chute first to make sure it’s safe?