So I've tried to figure it out myself through trial and error, but I've had limited success, so I'm asking - does anyone know how traits work regarding male slaves ? Obviously they aren't eligible to some specifically female traits, but they can get a few like Sadistic or Deepthroat. But when I try to give them new traits, sometimes you get what you expect (e.g. Deepthroat after 100 deepthroat actions), and other times they can't seem to gain any traits. And then you also have slaves that gain some traits just fine, but never gain others - it's quite confusing.
I thought it might have to do with Submission, with sexual preference, with whether they're a guest or a slave... But I've tried to test for all of that and I can't seem to make heads or tails of it. If anyone can enlighten me, it would be greatly appreciated.
(Also, is there a list of eligible traits for males ? So far I've identified Sadistic, Cumslut, Anal Slut and Deepthroat, but maybe I've missed some.)