Heads up, head 'hos: A Spanish study in the June Journal of AIDS asserts that deep-throating is a loooooooooooow-risk pastime for HIV transmission. For 10 years, 135 HIV negative partners in serodiscordant couples engaged solely in latexless head bobbing. The outcum: 19,000 unprotected headjobs, not a single seroconversion. But, señor, did you swallow?