In which cases should teenagers be allowed to have plastic surgeries?

In which cases should teenagers be allowed to have plastic surgeries?
The passage:-

Plastic Surgery
According to the American Society of Plastic Surgeons (ASPS) statistics, 284,405 cosmetic plastic surgery procedures were performed on people age 13-19 in 2009, which is 2% of all cosmetic procedures for that year. The ASPS states that plastic surgery can be beneficial for a teenager who has the appropriate motivation, mentality, maturity, and mindfulness.
Motivation: The desire to undergo plastic surgery should come from the teenager, not his parents, peers, or a boyfriend or girlfriend. They must be fully committed to the change.
Mentality: They should have realistic expectations about the benefits of plastic surgery. If they are expecting sweeping life changes, such as a change in popularity status or the attention of a special someone, such teens may be sorely disappointed, even if the surgical result is acceptable.
Maturity: Teenagers should be physically mature enough to have the operation. Body parts mature at different rates. The nasal bones are not mature until age 15-16. Breasts mature until at least age 18.
Mindfulness: Teens should be aware that plastic surgery is surgery. Incisions can be painful and recovery and healing take time. Teens should be able to understand the procedure itself, the risks, the benefits, the recovery, and the possibility that the outcome may not be exactly what they’d hoped for.

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