Only in Nepal? Your friend's aama is your aama, your friends buwa is your buwa? same goes with daju, bhai, didi, bahini, kaka, kaki, mama, maiju and whole lotta other relatives EXCEPT his/her srimaan/srimati! hehe! You get away calling the guy/girl you have been eyeing daju/bahini! You flirt by singing? remember dohori?? You try to trick your friends by creating a new way of talking ? like this "cha-mai cha-le-cha-bha-cha-ne-cha-ko-cha-ku-cha-ro-cha-oo-cha-sa-cha-lai-cha-na-cha-bha-cha-nnu! What a tongue twister that used to be!