What is the definition of HTI—Hug Transmitted Infection? Mike Spara tells you in his wordless solo sketch, "Give That Guy a Hug," one of more than 14 that constitute his show Conversations With ... Body Language. In the “Hug” sketch, Spara portrays a man who wants to give out free hugs. In the background, words on a projection screen explain that the man who is trying to give away free hugs is “totally clean and free of STDs: Sexually Transmitted Diseases, or to use the less archaic term, STIs: Sexually Transmitted Infections.”