I'm going to open up a real can of worms here! (rubs hands together) 
Have you noticed the number of posts on this forum that say something like 'I'll give my phone to my wife/gf when I get the new one' or 'I gave my 2G phone to my wife/gf when I got the 3G'? I haven't heard anyone say I got my wife/gf's old iPhone when she got a new one have you?
Not saying none of the ladies have nice shiny new ones; there are posts that say they've got a new one each, just that it seems to be a one way traffic in used iPhones.
Why should that be I wonder? Gentlemen, you may now justify yourselves!
Have you noticed the number of posts on this forum that say something like 'I'll give my phone to my wife/gf when I get the new one' or 'I gave my 2G phone to my wife/gf when I got the 3G'? I haven't heard anyone say I got my wife/gf's old iPhone when she got a new one have you?
Not saying none of the ladies have nice shiny new ones; there are posts that say they've got a new one each, just that it seems to be a one way traffic in used iPhones.
Why should that be I wonder? Gentlemen, you may now justify yourselves!