Has my dog turned gay?

It's not necessarily a dominance thing. What it is is that if a dog smells another male and doesn't pick up on the male scents and hormones he assumes it is a female dog, and may get a little frisky. Flash isn't giving out female hormones but Harley thinks since he can't smell a guy then she must be a girl. I had that experience with my Mel, a Miniature Schnauzer who became the love interest of a Rottweiler in the neighborhood. There really wasn't much that could be done except discipline and keeping the dogs apart. And Harley is probably hitting his stride as a guy, so he could be running a bit hot in the seat so to speak. This was confirmed by my vet.

In my experience, un-neutered dogs have a desire to display their dominance. I've seen it in my male pug (who hasn't been neutered yet, but has an appointment next week) when he goes to visit his doggie friends next door. He knows that he's the one with the testicles and he tries to dominate the space by agitating the females (even though they've been spayed for years) and being tough with the males. He wants to become pack leader.

My best guess is even though your dog knows this other dog, he wants to send the message that this is HIS home and HIS pack. The best thing to do is to get him neutered. Unless you're planning on breeding him, he won't be using his testicles and that bears the risk of unnecessary illnesses in the future, such as testicular cancer. As the dog gets older, vets will be less willing to do a surgery on him, so the best time is the present.

No, but I've been told that in some cases with both male and female dogs hormones can still be put out even after alteration. So, your dog could be picking up on some of the other male's hormones.

Most likely it is because the other male is NOT a constant member of your household and as a visitor your hav. feels it necessary to remind the visitor where he stands.

It's a dominance thing and nothing more. Dogs are not attracted to each other like us humans are. You need to have him neutered before he starts doing it to peoples legs....lol.

Homosexuality is actually more prevalent in wolves (and therefore, dogs) than it is in humans, so maybe.

i have a girl dog and my neighbor does too, they hump eachother all the time... i guess thats why we call men dogs, right?

possible

dogs often take on the characteristics of their owners

Lol