Twenty-five years ago, two pals went out for a seafood dinner while vacationing in the Bahamas. What could be better than some fresh grouper steaks and a night on the town without the wives?

Um, plenty.

A few hours after dinner, the men started having stomach pains and diarrhea. Their legs began to tingle and burn. And their sense of temperature went haywire: Ice felt hot while fire felt cool.

All the while, their wives were completely fine — until they had sex with their hubbies.

HIV has reappeared in the blood of two Boston patients who scientists had hoped had been cured of their infections.

This disappointing development, reported by The Boston Globe's Kay Lazar, is yet another cautionary tale of how researchers can never afford to underestimate the human immunodeficiency virus's ability to hide out in patients' bodies and overcome their most ingenious efforts to eliminate it.