There was some story about a guy and 3 girls he fucked. The guy killed 2 super busty women to attach their breasts onto 2 young girls. He fucked them and a third girl, but only anally or something like that. Here's a quote:

"“Shit, these things are heavy.” Shi didn't dare to look inside them. But she could tell that their content was huge. Rather than breasts, it looked more like there were human heads inside these bags. But then again, they were even too big for heads.

Shi couldn't understand why anyone would want to have such gigantic tits. And even less why her brother was willing to kill people to give his girlfriends these ridiculous tits."