My neutered cat was humping my spayed cat- isn't that abnormal?

No, it’s not abnormal. They still sometimes exhibit the same behaviors, they just can’t follow through with impregnation (sometimes it’s learned, sometimes it’s instinct, and sometimes it’s dominance).

There’s a tiny chance that he was a cryptorchid and your vet not only didn’t go into the abdomen looking for it, he also neglected to inform you of the fact. But I seriously doubt that’s it.

Not really.

My old cat that died in May would hump a fuzzy blanket, and over the years he would get a little ‘funny’ with the other cat (s) in spring. lol

The instinct is still there, but the parts do not function. While neutering does diminish the sexual drive it does not mean there are not occasional flare ups of drive.

The older they are when you get them neutered, the more likely they will do that. If you neuter before they start attempting to mate, that usually doesn’t happen. Once they reach sexual maturity though, even if you neuter them, the instinct is still there.

@syz What on earth is a cryptorchid?

@diavolobella He was neutered at a young age, and to my knowledge, had never mated.

This is interesting guys, thanks for the info. I was under the mistaken impression that neutered cats didn’t bother with sex anymore. On the other hand, my female didn’t really seem to mind it either, LOL.

my female cat has been spayed but she tries to mark furniture. thank goodness nothing happens!

neutered cat = insecure

Cryptorchidism is when one testicle is retained in the flank or abdomen instead of “dropping”.
@syz is right. Any vet who can count to 2 would surely have let you know about that.
My male cat used to hump a stuffed animal, he never would tell us why he did that.

It’s normal. Old habits die hard (why do you think Viagra is so popular?)

Even if he had never mated, it could be, as @syz said, his natural instinct or a dominance thing. Mating is not only about reproducing.

My spayed female dog humps my neutered male cat…I think you’re ok. :)

It’s very normal. Like @syz said ..the behaviour is still there and may always be. It’s a natural instinct. Neutered animals may also still attempt to hump females in heat…females do so as well. The usual reason a neutered/spayed animal humps is to demonstrate dominance and sometimes just plain excitement.

My dog is 14 ..he’s been neutered for 12 years ..he still humps the cats (which are all neutered males) and some dogs.

Not at all. My neutered dog tries to hump the toddlers every once in a while. It means nothing.