Neutering does not stop the "red rocket in the fur pocket" from making its appearance. 
I know he wasn't talking about the testicles because he said "Oh there it is" when "it" made it's appreance. I thought what a creep!...Like he was checking out my child! I got in protective mode and pulled him away.Umm...I don't know how to say this, but it's not exactly a gland.
Are you sure he wasn't talking about the testicles, like whether the dog was fixed yet or not?
Either way, it's a very strange thing to say to strangers.
Red Rocket still definitely comes out. We actually got Lucky neutered last Friday. He is still a humping fool.....As for the guy at the soccer game, kind of weird. Although I notice a lot of people will ask me that about Lucky as well....just not in that weird of a way.