I can! If you wanted molestering you woulda asked for it, amirite?
maybe if you weren't naked...
It depends on the person whose back gets scratched, and the manner in which it became scratched. If you were trying to squeeze through a tight opening, and happened to scratch your back -- it would remain innocent. If you happened to pay a person to dress in unusual garb with instructions to scratch your back -- that scenario might not remain innocent for long.
A swinging rake would seem less than innocent