Sorry to post without really actually contributing but I'm in search of a story I stumbled across a while back. The main premise is a man's developed a machine that can transfer attributes between two things (I believe the example he uses is to give the tensile strength of steel to cotton wool so that one could build a bridge out of it). He's got a hot tiny (middle-eastern maybe) girlfriend but wants a bit of the statuesque model who I believe is their neighbour. I think you can see where this is going... They agree to use the machine, blah blah blah, awesomeness ensues! Ring any bells with anyone?
For those of the 'What's this post for, I want MOAR!' attitude, here's a couple of stories a wrote a long time ago. Warning, the first contains a little incest and many many typos.
http://overflowingbra.com/results.htm?varname=474
If you like my work you can also find a little more of it on Max's trasfertheme, including the beginning of a story from way back that got eaten by an old computer.