When I was at Sea a messmate(the AB on the other watch actually)had this rather nasty habit of having 3 raw eggs for breakfast, which he would puncture and noisily suck in the messroom in front of the rest of us ,his, sometimes hungover, breakfasting shipmates. We got a bit fed up with this so, on a trip home for a weekends leave I picked up a small hypodermic syringe and a fine needle. A few days later, when the opportunity arose, into the little airsack cavity at the end of the egg we introduced nearly a cc of Tabasco sauce, The expression on his face when it hit the back of his throat was Classic. For some reason this little habit of his ceased.