It's important for Muslim couples to walk into marriage with...
It's important for Muslim couples to walk into marriage with proper information about sex and sexual etiquette from an Islamic perspective ( the book Marriage and Morals in Islam, by Hujjatul Islam as-Sayyid Muhammad Rizvi is one such valuable resource ). They both need to know what is halal (permissible) and what is haram (forbidden).
They should also keep in mind that spouses must never discuss their sexual relationship with others, unless it is to get help for a specific problem and that too one must get it from the right person. On a similar note, it is important for both the husband and the wife to remember that they need to make themselves physically attractive for each other. Too many couples take marriage to mean an excuse to now let themselves go.
The couple or one of the partners may gain too much weight, or may not care about hygiene or their looks in general. The universal…