You must have noticed your cat being all crazy over the smell of catnip. Do you know what is a deal with felines and catnip? I will tell your fun fact now. Cats naturally have the scent of catnip bended to their nasal passages. So whenever they get a little whiff of the herb, they go all mushy and lovey-dovey. Ye want to see different colors of cat? Let it be around catnip and you will see wonders.