Umm... there's a difference between three 'words' that all come from the
same word.

"Hentai" is sick and twisted and perverted.
It also means 'changed'.

"H" means something not so perverted, but has stuff like shower scenes,
etc.

"Ecchi" is more gentle than 'H', and it can be considered as a compliment
at times.

<comparison of Cutey Honey, Urotsukidojii, and Ranma 1/2 snipped.>

Could someone please explain to me the word sukebe? Some people have told
me that is is between ecchi and hentai and just means lewd, but others have 
told me that sukebe is much worse than hentai.

Hrm... I'm not quite sure about sukebe. I guess it depends where abouts in
Japan you are ... But I'd say that it's between H and hentai ... But it is
what you yell at someone when they're doing stuff you don't like, like
the chikan on the train.

Kun-chan...