User blog comment:ShatteredRose23/Butts v.s. Boobs Debate Page/@comment-26709288-20161203125050/@comment-26709288-20161230125205

You mentioned upright right here: " Humans walked upright since the start, since the link before them walked upright as well. Your argument makes no sense just from that."

We evolved with bipedalism but our earlier ancestors didn't have it: https://en.wikipedia.org/wiki/Bipedalism#Evolution_of_human_bipedalism