I've read through Pavlina's polyphasic sleep blog entries and some of PureDoxyK's entries before, and IIRC neither of them went into detail about how it affected their sex lives.
Dude, I wrote a whole page about it, and put it on the main polyphasic page of my site with the link "Polyphasic Sleep and Sex"! What more do you want??!
;)
It's here: http://www.puredoxyk.com/index.php/index.php/about-polyphasi...
PD
(P.S. Yes, girl, and married. And pro-nookie. ;)