Dear cat friends and lovers , here is my theory on rainbows leaving a subliminal effect on us , as the 7 colors that are in them are noticed by our subconcoius ,  rainbows make a fuss arround them , and groups of 7 do the same , for physical perceptual reasons , so if N is the number of people , N / 7 would be the maximum number of fuss creating groups that could be created