Yes, this is close to my heart (well, other parts too
) -
as time-served cruxers here will know,
I like the idea of being cruxed wearing some minimal undies or loin-rag,
only to have them stripped off when I'm hanging there helpless -
it's hard to explain the sexy feeling a girl can get just from the feel of cloth against her skin,
especially when she's nearly naked, exposed and knows she's at men's mercy -
it seems to add to her (well, at least this girl's) self-consciousness
and sense of vulnerability.
Like Barb, I think I'd pick red, colour of martyrdom.
But, of course, as Thessela would remind me, I have no choice...