Age is very important to Thais. If you speak to the local here, first of the questions they will ask you is ‘how old are you?’ This is usually to establish how they can relate to you. If you are older they will wai you in a different way than their friends. (you can read about wai here) So, they will lift their hands a little higher and bow their heads a little lower.
I was in a club last night and was chatted up by a cute, younger looking Thai boy (but, let’s face it, they all look like they are 16). He asked me for my name and then about my age. ’33’ I said. He then smiled and waied me, lifting his hands to the forehead and bowing almost to the ground.
He was 22.