The couple married in 2005 and Kutcher said that although he's gone to extreme lengths to be romantic, it's sometimes the little things that matter the most.
Appearing on OK! TV, he said, 'It was worth it. I just think that sometimes romance is only doing something that's a little bit uncomfortable.
'Romance can be the simplest, easiest thing, but it's really just about doing something that's uncomfortable for you. So if you don't know how to cook and you cook for someone, you're willing to make that fool out of yourself - that can be a very romantic thing.
'If you normally don't take the time to do something and you do one day... it doesn't always have to be something grand.'