Surely there's no causal relation there, purely coincidental?
From a survival of your genes point of view, you could argue that having 'nicer' legs (possibly leaner, more athletic) would help you more than having bigger breasts. Or maybe you could argue that a man might subconsciously associate bigger breasts with higher fertility.
( Labia Majora You keep on talking but it makes no sense at all, Fri 14 Jan 2011, 12:15, 2 replies, latest was 15 years ago)

i'd kind of assumed it was an image thing
but everything i type here makes me look snobby and retarded so i am not going there
( rachelswipe with a fork, Fri 14 Jan 2011, 12:18, Reply)

That's sucha snobby retarded response

(Bazongaloid, Fri 14 Jan 2011, 12:22, Reply)

and intelligent men are after lower fertility
makes sense
( Vipros. clever got me this far, then tricky got me in, Fri 14 Jan 2011, 12:19, Reply)