Bondage is a metaphor for seduction. So are vampires, but blood makes me want to faint. My tied-up-girls art is based solidly on Victorian artists' damsels-in-distress fantasy paintings. Look up 19th-century painting and you'll see tons of stuff like this, just with more conveniently-placed shreds of cloth and fewer overt acts. Damsels in distress are cute! They make you want to rescue them just like Luke Skywalker did, although I’d rather not find out she’s my sister afterward.