Can a male dog not be neutered correctly?
Usually if the dog was fixed at about six months then they have little if any desire to “engage”. If you wait until the dog is older then a lot of them still have the mating instinct. I had two blacks labs, one I got as a puppy and had it fixed at six months, I adopted the other one when she was two years old and then had her fixed and she would always mount the other one in dominance but never the other way around. My first dog would just stand there like she was oblivious as to what was going on and then she would just walk away.