My friend in Norway has asked me to investigate where and what it costs and the removal of unwanted hair on large parts of the shoulders and back in Thailand.

Someone who can recommend a clinic in Bangkok / Pattaya / Hua Hin etc

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he was born like that, your boyfriend, with half of hair, or it's like the commercials "BEFORE" "AFTER"

There is now a "wax" shop in Central Embassy in Bangkok. Waxing removes hair as effectively as laser treatment. Neither results in permanent removal. The hair will grow back over time.

There's a hair removal system available via mail order called "No No".

Not exactly cheap but advertised as "can be used on any part of the body", painless and nothing else needed. One purchase and no additional outlay

The OP's friend should consult with a dermatologist at one of the major private hospitals,

He should stay away from "clinics" which offer laser therapy.

All of the hospitals have laser derm departments which can do this.

Contrary to what one poster said, it is permanent. However it will take at least 5 sessions spaced 2 months apart to get most of it. If he would be happy just to have less, three treatments might do it, but still he'll have to be here a long time.

I get mine shaved every 3 weeks. Cheapest.