Do larger posteriors correlate with manlier faces in girls?
This is something only assmen would have enough anecdotal data to know about -- particularly their frustration in finding a girl who meets their preferences but also has a cute, pretty face -- and I suspect it's true for several reasons:
1) To recap two previous posts on the psychological differences between boobmen and assmen (see here and here), boobmen seem to be the gregarious guy's guy sort, while assmen tend in the Type-A businessman direction. The workaholic likely has higher testosterone, evidenced by his drive and ambition. So, whichever females the high-T males prefer are likely to inherit the genes that drove her father's T level up so high. This has the unpleasant side effect of giving her a more masculine face (and personality). If high-T males are more likely to prefer ass to boobs, then their daughters will resemble their mothers in booty size and their fathers in T level.
2) On average, porn stars nowadays have much more manly faces compared to those of the '70s or '80s or even most of the '90s. They also reflect the recent shift in the larger culture of focusing on ample rumps rather than large breasts. From what I've seen, this is true on an individual level today as well: the few who have flat or small butts are more likely to have girly faces.
3) "Bag over the head" jokes -- don't they refer more often to a girl with a nice ass than a nice chest?
4) Change over the lifespan: unlike the more precocious breasts, a girl's derriere doesn't really reach its maximum size until the mid 20s, which is when she may begin to look a bit more manly in the face than before, however girly she may have been. Case-in-point: Natalie Portman. The girls in the local teen dance club have pretty girly faces, but almost all have zero booty.
5) Population differences, perhaps? African girls definitely have bigger butts and manlier faces. Northern Europeans have flat butts and feminine faces. Mediterraneans, Middle Easterners, and South Asians have medium-to-large asses, but I'm not sure how feminine their faces are. East Asians have concave butts and 6 year-old girl faces.
This is one reason why boobmen are so much more faithful than assmen: their girlfriends tend to have a face worth sticking around for. For me, though, a beautiful face and a girly personality still win over a large, firm rump. Soon I'll get a girl like Mya who has both.