Living together before marriage can make this easier because you are not trying to mesh your lives just after the chaos of the wedding and reception. This can cause a lot less stress, but it can also be hard for some people because of religious beliefs, family, and other issues. Waiting until after marriage for sex is also hard if you are already living together but you are not sharing a room yet. It can be very challenging unless both of you are very firm in your convictions, and even then it is possible to slip up.