Perverted or just kinky? （へんたい）

He Says:
hentai　（へんたい）=pervert,abnormal
Many Japanese men have a perverted desire that can't be fulfilled in daily life.Some of them like to eat shit, fuck infants, drink girl's pee etc.
You can say hentai to people you don't like. It can hurt the people easily.
But if they are real hentai,they will smile.

She Says:
Like He said, if a person is a real hentai, they will smile and be proud of it. "Pervert" has negative connotations and not so many people are proud to be perverts.
So, if you're using hentai as an insult, you'd translate it as "pervert".
However, I think that in cases where it's something that someone's proud of, or when you're simply teasing your friends, I think that a more appropriate translation is "kinky".

The next word is...ふぞく。