It could be one of a couple different things. One is because that's the information he was born with. It's called inborn instinct. Just like the bios in your computer, we all start with a basic set of instructions already implanted to get life going and keep it going. The other reason he could be humping your leg is because it feels good. Basic dog philosophy, it is.
Even if a female dog is fixed, if she is on her period, there won't be blood, but she will still give off the nasty smell and that could possibly attract the males, yes. Sometimes though, a male dog (or MAYBE, female) just gets overexcited and, well, you know the rest :D
He will try to mate with her, stand up on her back & hump her. If she is not fixed she will get pregnant.
Yes. Only the testicles on the male have been removed, not the penis. Penetration will still happen, as the male dog can still maintain an erection. There is just no sperm production. Indeed, neutered male dogs can maintain an erection, penetrate a female and actually achieve orgasm, and will "tie" with the female. Most neutered males are less interested in sex due to lowered testosterone levels, but still capable of all the actions. They simply do not produce sperm and cannot impregnate a female.
A male may hump another male to assert their dominance and show the other that they are in charge.
The Border Collie male is showing that he is the dominant dog
Dogs can get 'hard ons' just like humans can. Its possible he can smell a bitch on heat.
no they will not they can sence when a female is preganet only on an occasion will he hump her but is very rarly he will
i think male even though they don't exist :)
The buck (male) will hump the doe (female)
that means the humper is the master
If your female cat is fixed aund another male cat is not fixed your female cat should not be attracted to the male cat but the male cat could be attracted to your female cat. ;)
I had an older male and when I got a female beagle and a yorkie (13 pound one) he didn't try to hump them but he did hump my aunts chihuahua