I believe vaginal canal was just part of male omega genital, perhaps it's like female vaginal canal but for male omega the muscular canal extends from their anus (for female it's vulva) to the neck of their uterus (remember this is omegaverse story where men can get pregnant) so basically this canal is a passage to male omega's uterus or it was actually just rectum canal....?
I believe vaginal canal was just part of male omega genital, perhaps it's like female vaginal canal but for male omega the muscular canal extends from their anus (for female it's vulva) to the neck of their uterus (remember this is omegaverse story where men can get pregnant) so basically this canal is a passage to male omega's uterus or it was actually just rectum canal....?