Most cat parents agree that they adore their feline friends because of the weird things they do. The unpredictability of funny cat behavior (Why do cats love boxes? And why do they zoom around at 3 a.m.?) livens up any household. But what you see as silly and entertaining is just your cat following their instincts.

Here are six weird things cats do and the science behind them.

1. Kneading

One of the most common and distinctive catlike displays of affection is kneading. You climb into bed or curl up in your favorite chair, and they show up to massage you and the blankets. Nursing kittens knead to stimulate their mother's milk flow. Cats may also use the behavior to scent-mark a beloved human, create a comfy bed or express contentment. It's a trait kittens carry into adulthood, notes the American Animal Hospital Association, often used to calm themselves during times of anxiety. In the cat world, kneading equals love and safety.

2. Presenting Their Tail

A cat showing their bottom to you feels like one of the least charming weird things cats do. This often happens when they leap into your lap for attention, pacing back and forth as you pet them. Instead of a face-to-face interaction, your kitty turns around and sticks their nether regions in your face. Gross!

Well, not to the cat. Scent rules the feline world: Cats identify each other by smell. Presenting the tail end first shows you your cat trusts you. That high-held tail position offers a friendly greeting. Does your pet consider you a fellow cat? No, but they're communicating the way they would to other cats, Discovery explains. Consider it a friendly invitation for a "howdy" sniff. (You don't have to accept the invitation, of course.)

3. Countertop Cruising

Cats love lounging on countertops, shelves and other second-story territories. The higher the perch, the better. That poses a hygiene and safety issue for cats who stroll across the stovetop. But you can't stop this natural inclination.

Pet cats, though no longer wild, inherit the instinct to seek high ground, notes Feline Behavior Solutions. They're hunters, sniffing out and stalking that tasty butter dish but also prey. Finding the highest ground in your house offers a nifty lookout, far from dog-sniffing and kid-poking range. Plus, it has the added perks of food rewards. To redirect your cat's natural urge, put away tasty temptations, make counters unattractive and give your climbing kitty a cat tree or other perch higher than the counters.

4. Staring at Nothing

Cats tune in to their environment. They hear and see things people can't, like that dust bunny floating through the air 30 feet away. It may freak you out to see your kitty sitting in a corner staring at something invisible, but rest assured, those feline eyes are trained on something important.

According to Cats Protection, cats hear things in the ultrasonic range that humans can't. They also have an eight-octave hearing range, hearing higher and lower than many other mammals. We can't know if they watch ghosts move across the room. But, more likely, your cat tracks the sound of insects behind the walls or mice in the ceiling.

Your cat also sees things differently than you, explains Live Science. Humans see light in a spectrum of colors from red to violet. But some animals (including cats) see the ultraviolet spectrum invisible to us, notes Live Science. Rodents use this ability to see and follow urine trails. We don't know what cats see, but when they act as though something enthralls them, it might just be invisible.