Why do cats bump each others heads?

My cat did that for all of her 20 yrs. We called it giving hugs, and you could look at her and tell her to give you a hug and she would bump your head.
I have worked with animals for the last 8 yrs. and the one thing that I know is that when they bump heads it is a sign of affection, and when they rub faces & cheeks its passing sent from one to the other.
I had never heard of the gland thing, I will have to check that out. I worked with cats for yrs. mainly feral cats.

Tigger, who is my avatar, is a feral cat that I tamed when he was about 5mo. old. He always likes to rub his cheek against mine while purring up a storm. It's something he's done since he let me touch him. Now, whenever I'm really stroking him and giving him his daily massage, he will do that constantly, sometimes while drooling a lil. It's just his way of saying he really loves me by putting his scent on me thru the glands right under his jaw up near his chin. He's the only cat I've ever had the pleasure of sharing my life with who does this.

I came to know that only now. Ill try bumping the head of the cats here and see if we will be friends. But I dont have a cat at home, but there are lots of cats in the streets.

I always wondered why a cat did that, mine used to do it to me, and I could never understand why they did it. I thought that they just wanted to be fussed. I cannot do it with them now as I no longer have any cats, but it is certainly worth remembering for the future if I ever get another cat that is.

You are so right beauty. I have never seen two cats do that but my cat has done it to me alot and I have done it back and WE are sole mates. Honest. She follows me everywhere except when she is sleeping. I love my cat she is the best cat I have ever owned and to think she was left for dead by her own mother.

Hello dear beauty queen. It is interesting for me to know something about cats' bumping each other on the heads. I also see this happen when two cats are playing with each other. I think that they are friendly to each other and they show their affection to each other this way. Thank you very much for your information and careful observation about this respect of cats. Take care.