Yeah, I don't know why but when I read milking walbauk, I thought that was simply milking a walbauk like a cow and I didn't know why I couldn't unkock it, than I read some comments and realised how stupid I was, considering the tipe of game this is. XD
Maybe you skipped, or forgot (I don't remember precisely either) but when you visit Bareshade with him and when you read his wife journal you know pieces of Ste story: more or less he is a fugitive from his place, since all the other minotaurs have an illnes that makes them angry and horny or something like that.
I've tried to see all possible endings in order to know more about the illness and make more theories, but in my official playthough I saved them, because I'm not a psycopath XD