Just thought I'd share this with you all. I've used the Escalation Ramp at the end of the ladder successfully to get girls naked, but I can't comment on whether the incidental/overt dynamic works in the build up to the actual seduction.
http://www.vindicarlo.com/DiCarlo%20Esca...lo.com.pdf
http://www.vindicarlo.com/DiCarlo%20Esca...lo.com.pdf