Show boobs cannot ah.
Then take of your skirt and panties and show the counter guy your
pu55y hair.
Then tell him my hair so much 16years old liao la 
Then proceed with a act cute face. 
100% can.
Serious note which is not so serious here.
Just lend secondary school ezcard from your friends that in poly
already.
Then go ticket counter show him the card.
Counterman: Why you 18years old still using primary school ezlink
card
Girl: I retain ma.
Counterman: Retain until two years.
Girl: I retian + I studying in NA ma.
Counterman: Can i trust you?
Girl: You dont believe you call my school call my parents want
anot?
Counterman: Tsk tsk, kk go in go in.
Moral of story, there is no idiot that wants to trouble oneself in
the world.