I'd never heard about that rule before but when you test it out with a camera, it's true.
I trawled through the archives concentrating on threes.
Then I came across this shot from last winter. It doesn't quite fit the rule but the lines crossing in the middle of the shot draw the eye to that point and I see three at that point. It works for me.
I went looking for more examples.
And then looked for examples with five objects. I don't think the shot looks too cluttered, maybe because the hens are all at different levels. I had to be quick, Aiden thought we were outside to put them back in their run and was doing a bit of hen hunting.
Actually I think I prefer the shot with five.
Thanks for this topic, Rebecca. It's good to learn something new. I'm sure, once I've looked at how the others of the team composed their Odd Shots (they will be here), I'll have a deeper understanding and be able to cope with choosing the Spotlight photos for this week.