The 32-year-old No Strings Attached actor said that he broke his usual pattern by getting to know his future wife first before the relationship got physical.
He told Redbook, "My relationship was a relationship first.
"Well, there wasn't anything physical happening for a while, but from the get-go it was more than friendship. It was a deeper connection than that."
The couple married in 2005 and Kutcher admitted that it was nice to settle down for the right reasons.
"I think guys wind up... not wanting another guy sleeping with the girl they're with," he explained.
"But eventually everyone wants something more. We all have that desire for something special, something committed. We all want to be The One."