I’ve never felt another woman’s breasts, real or fake (!) but I can’t imagine they feel natural either - whether ‘wearing’ them or touching them...
My SIL had a boob job every time I give her a hug in greeting or leaving her chest is as hard as a rock!! Just YUCK!!!
That was covered in the 1991 Steve Martin film "LA Story." The joke is that so many women in LA have implants that Steve Martin thinks that Sarah Jessica Parker's natural breasts feel strange:
https://getyarn.io/yarn-clip/2fada5a7-8d5b-417b-a7f0-d94c706bf746