Under loose clothing you can easily wear a ropeharness that makes you very very concious of your body... every movement reminds you of what you are wearing and nobody around will notice as long as the knots are placed in strategical places.. most not overly restrictive bondage will be interpreted as underwear by outsiders if you wear it the right way... also interesting is to be hobbled under a long skirt, either at ankle or knee height.. so you have to take small steps.. actually there are skirts that are kind of restrictive all by themselves because they are cut pretty tight around the knees.. all a question of interpretation.. if you and your Dom/me talk about a situation and find some sexual connotation in it it will be fun, wether or not it is something that would be rather normal in a vanillacontext or not... It has the same significance as calling each other with private Slave/Master names that make you think of your special relationship but that sound perfectly normal to vanillas ;-)