Sex educators Megara Bell and Brian Flaherty (both from the Boston group Partners in Sex Education) are a little stiff on camera, but the message of their delightful science demonstration (with controls!) is clear. If you’re in a pinch, microwavable plastic wrap is impermeable to viruses and you can use it to fashion a MacGyver-like dental dam.
Contact the author at diane@io9.com.
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