I'd say it's probably the top fantasy, certainly amongst my girlfriends.
Not sure if any girls actually want this in reality but it certainly is a great help when roleplaying with your lover and hubby.
Things really do get hotter when you're with your lover and beg Him not squirt hot cum inside, or turn to your hubby and ask him why you are letting this happen to you as he knows you're ovulating, or my favourite, tell hubby your lover want you for the weekend to be a breeding bitch for all of His friends.
I've spent many amazing weekends as a Party Mouth and loved every minute of it and why not?
YOLO