A recent post from ErosBlog would actually make a pretty decent slave-training exercise. A girl is given 90 seconds to convince a fully-clothed man to unzip his pants and take out his dick for a blowjob. She may not speak. What does she do?
Here’s one girl’s solution. Depending on context (at a fetish party, say, but not at a supermarket) it could work on me!
Elsewhere on Bondage Blog: