I've got 3 cats. In a dry climate, cat hair goes anywhere it can stick to. All someone had to do in the age of polyester dress pants was walk in the door, and they were covered.
If you know someone has cats, and lets the cats sleep wherever, make something cat-fur hiding. I used a lot of oriental print squares in a quilt, along with white, and don't notice the cat hair. I made a pillow cover throw out of the cheap quilted stuff sold in stores, it was all white and sleazy, and the Snowshoe's darker fur is covering it. I don't see it on the good white cotton.
My cats rule.