Can you tell female from male dogs without seeing their genitals?

Everyone thinks my male Shih-Tzu is a female since he pees by crouching, has long flowing hair and watches Oprah.

In both of those pictures the male’s tongue is hanging out and he looks a bit goofy (regally goofy, mind you, but goofy nonetheless). Perhaps this is a tell.

Nah, that’s just a tell that he’s a golden retriever.