I expected this to happen

barber auntie aka barbie auntie: Eh boy...ni yao jian tou fa ah?
poor hapless boy: ermm...
barbie auntie: lai...zuo sia. ni yao jian se me?
poor hapless boy: er...jian bao
barbie auntie: -_-
poor hapless boy: er cut thin...
barbie auntie: side want slope?
poor hapless boy: er ok
barbie auntie: slope want high or low
poor hapless boy: er not so high lah...also not so low
barbie auntie: -_-
poor hapless boy: eep

barbie auntie then proceeds to cut off a side lock of his precious hair to demostrate before proceeding to lop off the entire left side of poor hapless boy's precious keratin fibres. poor hapless boy cries inside his heart...

barbie auntie: back want slope or not
poor hapless boy who has learned his mistake: er yeah...but not so high lah
barbie auntie: grunt. snort.

barbie auntie proceeds to use a shaver to mow the lawn that is poor hapless boy's head...
poor hapless boy after all that sloping now has a ball for his head...uguu~

what would have resulted in a much better ending for all parties involved:

Barbie auntie: eh boy...ni yao jian tou fa hah?
Enlightened boy: Eh...bu yao lah
Barbie auntie: Siao!