Correct. What would have been the vagina on a female embryo drops down to become the scrotum of the male embryo. Thus, presence of a scrotum = absence of a vagina. (PS the seam of the scrotum is where the (would-be) outer labia fuses together).
Reminds me of a joke........................
There I was balls deep in a guys ass I went for a reach around and he had a hard on. That's when I realize this guy is gay.
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