I do also think the fact that the jeans are tighter and have fading on the butt factor in. If you look for pairs that have smaller back pockets, more fading/light and are slimmer fit, that'll make a bit of difference!
I guess to clarify, one section of fashion, then in that different sections on each type of item (denim, shoes, etc). I think otherwise, it may be difficult to find a thread or would be full of non-relevant posts.
What types of things would you like to see. Maybe a General Fashion and then segmented into sections on jeans/shoes/accessories etc? That way there's still some separation but still general enough to discuss whatever.