The original game had a vaguely heteronormative twang
Over the years fans have expanded this to include other forms of sexuality and gender
in 1998 Sandra Linkletter updated the mating scripts to both allow females to initiate sex and to allow same sex mating.
Download both a modified world and a cob of the scripts to add to any world:
This update was the basis of her Terra Nornia world and many others.
I believe it was Slink that came up with the Equals Genes, versions of mating and courting genes for both sexes.
Also in 1998 Juli created the Amazon Norns who have reversed gender roles,
with the females being more hardy & solitary and the males being more timid & sociable.
The main contribution I made to queering norns was the Transgendered Norns back in 2002, which I updated somewhat in 2003
These norns have the appearance of the other sex
In addition there are Gay, Transgendered & Non-Binary norns for C3