Violation of all volatile senses..using vicarious methods to produce vicious results..often vindicating their own voracity by tickling the ticklee until she/he cries out "You Master are Victorious.." hehe
Zzzzzzzzzzzzzzzzzzzzzzzzz is the sound a worn out but totally fulfilled tickle slave makes after enduring an all out tickle torture session, sending her into the seventh zenith..
Too bad I didn't have the letter "B"; I would have said a belly/belly button to tickle. Since I picked up with "K," I guess I'd have to go with Keep communications open and Keep the trust with a safe word.