Maybe for some people it isn't a case of being uncomfortable with sex, but rather being uncomfortable with unwanted advances.
I think you are absolutely right. If the game could use friendship triggers more clearly, many of the complaints simply wouldn't exist. But on the other hand, the game itself would become more predictable.
Although in general I don't have any problems with establishing friendships or personal relationships in the game. But I agree that this can be problematic for some.
