I don't get it either, but these trends are always evolving. We've been in an "ass age" for probably at least a decade now, so maybe we're finally due for another tit Renaissance. Time will tell.
I also don't get why a huge ass is so appealing. I mean yeah I want a girl to have a certain amount of junk in the trunk, but for me the shape of her ass is waaaaaay more important than the size, and there quickly comes a point where an ass is too big for me. But of course, a lot of ass men probably feel the same way about tits, so to each his own.
Don't get me wrong, I love asses. But I worship tits. The perfect woman ideally has a great set of both. But if my choice is between a woman with huge tits and a flat ass vs. an amazing ass and small tits, I'm picking big tits all day every day without a second's hesitation. A great ass is a bonus. Big tits are a necessity.
It's funny - a few years ago I was in Vegas with my friends (who are mostly ass-men) for a bachelor party. We were at a table in this bar/club and they were all commenting on this chick with a huge ass in this tight miniskirt that was dancing and twerking on the dance floor nearby. They were all saying stuff like "daaaaaamn, that is the nicest ass I think I've ever seen". The single guys in the group were arguing about which one of them was gonna try to approach her, etc.
I said nothing, because I had barely even noticed this girl or glanced in her direction. My eyes were locked on a different chick on the other side of the bar with a pair of what had to be at least H-cups in a push-up bra that were spilling out of her low-cut dress. My friend next to me literally had to snap his fingers in front of my face to break my trance when the waitress came for our drink orders. My buddies all laughed at me for being so mesmerized by this girl who (by their standards) was like a 6 at best. There were plenty of "hotter" girls all around us, but once I spotted this chick's giant gazongas I got tunnel vision and it was like nothing else existed.