Frankly, I think that there is a real danger, in postponing sex until after marriage, of discovering that the newlyweds are, well, sexually incompatible. Sexual incompatibility is the term used to describe when two partners have different sexual needs. Each partner may enjoy different types of foreplay, fantasies, intensity, or frequency of sex. A sexually incompatible couple has a lack of sexual understanding between them, which leads to dissatisfaction, and sex is important, like it or not, for most such relationships. Studies show a decrease in relationship satisfaction if one or more partners feel sexually incompatible.Having tried both ways, I can say that my experience is that this isn't true.
Sexual incompatibility can affect all types of relationships, even a husband and wife. If one partner has a higher libido than the other, it can create friction and a sense of rejection. Partners can experience sexual arousal at different times throughout the day, not allowing for the timing of each other’s needs to be met. Sexual libido often changes, impacting sexual compatibility later in the relationship. If partners haven’t explored their sexual desires or needs early on in the relationship, these can become issues discovered later in marriage.
And @IndigoChild5559's statistic above fails to account for the fact that it is mostly for religious reasons that couples postpone sex until after marriage, and those same religious reasons are what impels them to stay together (however unhappy they may be) when they discover that they really aren't very sexually compatible. All too often, and we know this is true, the "cure" is infidelity, the secret tryst to satisfy needs that cannot be met at home. And that has its own dangers.