>>1988179My line between the two is more or less to denote intensity. Embarrassment is something that won't seriously negatively effect the girl. Some blushing and worry may occur. Perhaps some of the feels involved are intense... but it's a scenario that she can later laugh about, she might enjoy on some level, or just something she can handle.
Humiliation for me is when it goes beyond that. The girl is lesser for the experience. It's when things like her crying her eyes out start happening and thinking stuff like, "My life is ruined, I can't show my face to any of these people after this!" Sure, sadists who are into humiliation can exists, but even if the girl is into it, I can't enjoy it much, specially if it feels especially mean spirited.
It's arbitrary, I know, but that's just how it is. I'd rather blushing faces than serious tears, and humiliation is the name for the line between the two. It's got a lot of gray areas obviously, and that's just my personal view on it. Hardly textbook, I know.
