I am not familiar with the phenomenon, having been married for quite some time with no cheating and no bolt-ons.
But a friend who’s been on the market following a divorce assures me that if you can touch them, they are real.
LOL, I’m a man whore, and I definitely prefer real ones, no matter the size.
The problem is I like real fit chicks, and since they’re lean, a lot of them get implants.