Friends should make out! I kinda like this idea actually, he can't evade girls here as easily as back home.
Aidan has the mentality of a 12 year old, it's okay I'm good with this too, actually! It could just be a sweet forehead/cheek kiss type of deal. He was brought up in a place where kissing your mother is perfectly okay and not creepy at all, so I think it could work out just fine!