I thought that was something that peaked a few years ago and had petered out? Maybe I'm confusing it with vajazzling (sticking glitter about the minge) though. I'm pretty sure you don't hear the term designer vagina as much as you used to though.
I too prefer some meaty lips to play with, don't like those "tidy" slitty ones, look too much like infants to me. And, before you ask, I've changed plenty of nappies so I'm familiar with their anatomy for legitimate and legal reasons.