BALTIMORE, Maryland (CNN) -- Barry Mendez gave one of his kidneys to a stranger -- a good-natured act that has stirred concern among medical ethicists.

It is not unusual for doctors to get organs from corpses or from people who know the recipient. In 2005, for example, about 6,900 transplants involved living donors, nearly all of whom were relatives or friends of the recipient.

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For me, I don't know if I can even donate my kidney what more donating it to stranger? But this is not the issue. The question being raised is if it's even ethical. Someone will think that something is wrong mentally with Barry Mendez.

There's a lot of better ways to help others. If you donate your kidney and you died, you only helped one person. I'd rather live long and help many people as I can...

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I can't even imagine lying on the hospital bed... it's painful.
But I guess, if one of my relatives needs it... I won't hesitate to give it.