A few weeks ago, I had a great example of an interest that consumed my attention for a day but didn't last beyond that.
My wife and I went to the ballet.
I've always had this happen with ballet: I get obsessed with it briefly and then my interest fades. Back when I was 8 or 9 I attended my younger sister's ballet performance and wanted to become a dancer. It never went anywhere. A couple of times as an undergraduate, I went to the ballet. Always loved it at the time but nothing ever came of it.
So anyway, we went the ballet a few weeks ago. When I came home I spent hours reading up on terminology, watching videos of great dancers doing particular moves. I was obsessed. For just that day.
I woke up the next day and went back to Greek and linguistics. Maybe Carl Djerassi would call that the equivalent of meeting up with the same person every few years for just one night.