>>2850963sex is fine in botns since its not explicit (offscreen 90% of the time) and severian is explicitly left unfullfilled by the handful of women he sees. It's also heavily implied hes lying about several of these and using them as justification for his actions, given the book is a memoir. Also sev's what, 17-19 during the bulk of the series? Of course that shit is gonna be on his mind.
book 3 is peak /out/ with him walking through the mountains with the green light of the moon seeping through the thin atmosphere. creatures like alzebos are cool as shit too. My only complaint with the series is the last couple books shy away from the strange locales as much.
If all you focused on were sev's exploits with women instead of everything fucking else going on around him, thats on you. Cause thats only like 5% of the story