Oh... and about the sexual nature of things... I have never seen him be sexual at all, unless his defecation is some sort of sexual thing. (Holding it in until he goes in his pants type thing, digging, etc...). My youngest seems to be more sexual? (At least, he is questioning parts of his body and differences between male/female, etc, already. I don't suspect sexual issues at ALL with difficult child, in fact, I've never seen him curious about himself or anyone else. They don't have time together for him to be doing this. Time enough alone to maybe get a kick or punch in (we're talking only moments alone, once in a great while, because I keep eyes out), but not things of a sexual nature.
I've almost found it odd that there was no normal curiosity out of difficult child over the years.