Raising the butt is your cat's way of getting their anal glands closer to your nose so you can get a whiff of their pheromones. This is how cats introduce themselves to other cats. It is simply their way of saying “oh, hey. It's me.”
The cat's arching back is actually part of his complex body-language system. Not only does he arch his back as a form of stretching "sleepy" muscles after a nap, the arched back is also a form of showing that the cat is feeling threatened.
It's a Sign of Affection
Granted, it's not the same thing as a lick on the face or a rub up against your leg, but when your cat presents her butt to you, it means she loves you and wants to be petted.
Butt sniffing is a very natural, instinctual, and basic form of cat-to-cat communication. Strangely enough, it is how cats greet and get to know each other, along with sniffing of the chest and neck. Even cats that know each other well will sniff butts to “see what's new” and reinforce their bond and communication.
He may feel threatened, challenged or fearful. He may feel territorial to certain areas of the home. His aggression towards the female (and you) may be actually coming from outside - perhaps he can see and smell other cats or a dog nearby.
Male cats can tell that a female is in heat just by smelling her cheek glands or the pheromones in her urine. The female doesn't even have to be present, either. Males can smell where the female has urinated hours or even days before and may exhibit mating behaviors even if the female is no longer around.
When a cat shows you their belly, the cat is relaxed, comfortable, and doesn't feel threatened. They feel safe enough to expose their vulnerable areas without worrying about being attacked. They are pretty much telling you, “I trust you with my life.” It's a great honour!
PetMD also points out that cats are territorial creatures. They claim their turf by marking it with their scent. So when they sleep on top of you, they're actually marking you—and your bed—as theirs. We should be flattered by this behavior, apparently.
In the wild, cats are predators, but they are also potential prey for larger animals. When they sleep facing away from you, they are showing that they trust you. They are also showing that they plan to keep an eye on the surrounding environment for both of you.
Petting from humans mimics the sensation of being groomed and can provide the same pleasurable experience. Bunting (nuzzling and rubbing on you) is one way cats show love to you. Petting is a way to return that love. Cats also enjoy petting because it feels really good to them.
How a male cat behaves in heat. During the mating period, the male cat is restless, runs away often and has fights with other cats, meows insistently and marks the territory through urine. The male cat in heat is particularly difficult to manage, especially if he lives indoors.
Male cats tend to be more social and affectionate with both humans and other cats. They commonly form strong bonds with other cats in the home, even when they are not from the same litter. Females, on the other hand, are often more standoffish. If you are looking for a cuddle bug, adopting a male may be your best bet.
While your cat is on heat it's likely she will become very affectionate, 'flirty', start 'calling'/meowing loudly (it can even sound like she is in pain), rolling around, arching her back and moving her tail to one side. She will try hard to find a male cat, and male cats will be equally keen to reach her.
"Sploot" is a slang term for the position pets take when they lay on their stomach with their legs stretched out behind them.
Sleeping near you
If your kitty likes to sleep near you - or even on you - this is an indication that they have total trust in you.
The Nose Poke
Cats nose poke (gently touch their nose to the other's nose) only trusted friends, be they feline, human, canine, or equine.
Head, Shoulders, Cheeks and Nose
So, in which places do cats like to be petted? The head, chin and neck are often their favorites. While some cats enjoy having their tails touched, others will recoil and even experience pain from a tail stroke.
Cats can vary significantly in their comfort level at being carried. Some cats won't let you hold them at all, others might allow it but glare at you with quiet scorn, while still others might absolutely love it, even seeking out a person's arms or shoulders as their preferred perch.
Higher interaction
According to Discovery News' report on research on cat and human behavior, the No. 1 reason a cat likes female humans is because women tend to spend more time with cats. And the more attention they get from a person, the more likely they are to give the same amount of loving right back.
Are Male Cats More Affectionate to Female Owners? While a cat's gender doesn't seem to make a difference in terms of affection, Posluns notes that studies of cat personality also suggest it has little influence on the type of relationship with their owner.
One study found that domestic cats could find their way back home from a distance of 1.5 to 4 miles, so it's safe to assume they can at least pick up scents from that distance.