I've touched 2 pairs of fake tits. One was terrible where when you tried to squeeze and enjoy the softness you were interrupted an odd mass in the middle. They belonged to my friend's girlfriend and one night when we were all drunk he insisted we squeeze her new tits.
Then I briefly dated a girl who had fake tits and seemed to pride herself on them. low cut and tight shirts, etc. They shape was nice and they were a lot softer than the other girl's but they felt off. The consistency was all wrong. They just didn't move, squeeze or shake naturally. It was like being in the future and knowing someone was an android, not a human but all you can say if someone asks how you know is "They just look weird!"
First girl was white trash and the 2nd was rich daddy's girl.
Edit: For the record, I could totally live with the 2nd pair of tits. They didn't feel perfect but they looked fantastic and they don't feel different enough to take you out in the moment.