I suspect autism with him. He's an Engineer, so he has a lot of Braun power but I've had to teach him to greet me, say please and thank you, and introduce me to people I haven't met. He literally left me in his friends doorway when we were dating. (It was a party and he opened the door, walked in and started hanging out with their 3year old while I stood there dumbfounded until I started introducing myself as his girlfriend. Yes, we broke up over it, but we figured it out and now we're married)