Alex was a gifted author, although I've only read a smattering of his work.
His adult spanking orientation was almost entirely maledom (M/F), with perhaps a touch of F/F, and he did irritate a few femdom-oriented posters on the old soc.sexuality.spanking (SSS) newsgroup by stating that adult F/M stories struck him as "unrealistic."
(He didn't generally read them, except in his volunteer role as a reader/reviewer in SSS's summer Short Story Contests, wherein he was expected to respond to any stories randomly assigned to him.)
However, occasionally I read such remarks while seated at my computer somewhat less than comfortably, courtesy of my darling wife recently having wielded a paddle, wooden spoon and/or bath brush atop my undefended 'seat of correction.'
That would have me smiling sardonically. "Right, Alex, it's purely a fantasy..."
--C.K.