While recieving fellatio, the reciever either jams his cock to the back of the giver's throat before ejaculation, or the giver willing engulfs the mass of meat to fill the back of her throat. The result is that the penis head touches the tonsils at the back her throat while climaxing, leaving a thick coating of DNA on her tonsils. It is important that she not throw up despite her gag reflex, because then it would cease at being the Tasmanian Tonsil Tickler and become the Italian Bistro. Probably the greatest sign of affection one's lover can show.
Mary asked me if I loved her, so I gave her the Tasmanian Tonsil Tickler so that she would know my true feelings for her.