Maybe Orlanthi regard homosexuality as making the submissive
partner gender switch, as described in KoS. This would of course
be a social construct since most gay couples do not have a
active-passive split, but maybe that is how Orlanthi cope.
Of course they probably just kill gays, so gays join Lhankor Mhy
and hide in Jonstown or become Babeestor Gor or Humakt and
let them try...