Whenever my dom needs to convince me to do his bidding without exerting his whipping hand he puts me in bondage wearing only a pair of panties into which he inserts a small sponge soaked in rubbing alcohol. He can then leave the room and let me think about it. Must times I can bear it without a gag but by the time the alcohol has evaporated and he comes back to untie me, I am ready to do whatever he wants. The feeling is both of heat and cold and our only concern is that traces of alcohol in and around my genitals will degrade the rubber of the condoms he likes to wear. So we just double up.