Today it's common for couples to explore their sexual compatibility before making long-term plans together. But a new study sides with a delayed approach, in which people wait for a deep level of commitment before having sex.

The study involves 2,035 married individuals who participated in a popular online marital assessment called "RELATE." From the assessment's database, researchers selected a sample designed to match the demographics of the married American population. The extensive questionnaire includes the question "When did you become sexual in this relationship?"