Did you know that men have a small 1cm vestigial vagina in their urethra at the center of the prostate called the prostatic uticle, it opens and contracts like a cervix during ejaculation so it literally does the same thing just tiny and pretty useless, it doesn't go anywhere or lead to any ducts or glands.
It's also known as the vagina masculina or uterus masculinus or (in older literature) vesicula prostatica.