That's the whole point of why he even killed Brian to begin with. He wanted to groom his reincarnation Ian from a very young age so he would be loyal to him and not Sol. He mistakenly believed that if Brian/Ian had met him first, they would fall for him and not Sol.
Exactly and I do not know how Ian has not even thought of that first cause that is the first thing I would be thinking about and I would be so weirded out by that.
Kissed the same boy he raised as a child