Give me another day and I'll rework my vampire erotic into the main character, who is gender fluid and a shapeshifter, into getting choked out by expandable and stretching dick, while giving birth from their penis, with their penis being enchanted with Elastic Magic so the urethra is capable of stretching large enough to expell a human baby.
I can legitimately imagine Elio giving birth from his dick while being choked out by dick, I just need time