This article is from the Pratchett Newsgroups FAQ, by Orin Thomas email@example.com with numerous contributions by others.
I have a hard time reconciling this topic with anything in the TP books,
as, as mentioned in the DW Companion, there is no real sex in the DW or
other TP books. (No actual sex, just some before bits and some after
bits - as in Good Omens and Men at Arms). So unless you have something
to post about Carrot's purity score, maybe these admissions are best
left to the alt.sex groups :-)