Seems like feeling disgusted is a function of whether or not a child’s father can be named and not the multiple partner arrangement.
Babies are just a by product. Why does a one women-many men scenario itch people so much more than a one man-many women case?? Only because one carries the baby and the other does not?
Welcoming a child is a one time act. Subjecting a child to 75-25% off father days is a lifelong consequence.