Trying to do a virgin run and found that training with the warriors (lizardmen) makes mouth go to beginning level from virgin even though nothing physically happens with the player.
the training with them ends up in a oral gang bang, unless you mean doing the first training with the apple and the arrow. then thats the game adding a stat in a little too early i think.
I never ran into the oral scene. Only the arrow and strength training. Only hero rating increase, not bitch. Also rating for bitch is 0 so maybe that's why.