Ideas are a dime-a-dozen, at least to the ideators. Once you get it, get connecting cultural events & artifacts in order to solve problems in a creative way, ideas will come everywhere. Everywhere you are, and everywhere there's culture. They'll keep coming non-stop 'till the break of dawn.

Everyone has cultural artifacts that resonate with them, and they hold on to those in their mind. They look for ways to remember them, and put them to use (usually in conversation). "Remember when Michael Jackson's hair caught on fire!" "Yeah, it went up like a tree. Remember when we burned that dried Christmas tree. That was great."

In this age, the vast majority of our cultural artifacts are shared with at least thousands of people. Ideas are connections of these cultural artifacts in a creative context to solve an idea. So, the only differences in the ideator is the remembrance of the cultural artifacts, her ability to pull those artifacts and the creativity to put them together.

So, the idea spark is the ideators response to constrains in her cultural environment. To assume ownership of the entire idea, when it is only a response, is in service to the ego. If the ego is in the idea, then it's a disservice to the entire innovation process, and the product isn't going to reach the potential it would if the idea was vetted in a community ideation process. 

The Stairway to Innovation