What is the U.S. government’s view of a typical marriage? The statutes and regulations don’t go into detail on this, so the following comes from a combination of court cases and attorneys’ experiences. You certainly are not required to match every description on this list -- but the fewer you match, the greater the likelihood that you will face lots of questions and close scrutiny of your application.
The "normal" married couple has a fair amount in common. They share a language and religion. They live together and do things together, like take vacations, celebrate important events, birthdays, and holidays, join clubs or gyms, and
have sex and children.
http://www.nolo.com/legal-encyclopedia/free-books/fiance-marriage-visa-book/chapter1-6.html