Marriage proposal participant couple
A marriage proposal is a custom or ritual, common in Western cultures, in which one member of a couple asks the other for their hand in marriage. If accepted, it marks the initiation of engagement, a mutual promise of later marriage. 
Not all engagements begin with a proposal of marriage. Historically, many marriages have been arranged by parents or matchmakers, and these customs are still sometimes practiced in the modern day. Even when the decision to marry is made by the couple, it may not be communicated between them directly; for instance, in the traditional Japanese custom of Omiai, the formal decision to pursue marriage or to turn it down (Kotowari) is communicated between the couple's respective matchmakers.Customs and traditions
In Western cultures, a proposal is traditionally made by a man to a woman, while genuflecting in front of her. The ritual often involves the formal asking of the question "Will you marry me, ...?" and the presentation of an engagement ring (often in a small velvet box), which he may place on her finger if she accepts.Before proposing, a man traditionally privately asks permission from the father of the woman he hopes to marry. When practiced in the modern day, this is usually understood as a formality.The proposal itself is often supposed to be a surprise, although in practice this is rarely actually the case.  Surveys have found that most proposals are not surprises, and most wedding engagements begin with a conversation in which the parties mutually agree to wed.Couples in many Christian denominations have the option of receiving the Rite of Betrothal (also known as 'blessing an engaged couple' or 'declaration of intention'), which often includes prayer, Bible readings, blessing of engagement rings, and a blessing of the couple.