Bill Gates Will Pay For A Better Condom

Bill Gates has issued a "grand challenge" for a better condom and is offering a $100,000 prize to the start-up that comes up with a "next-generation" version. From the challenge site:

We are looking for a Next Generation Condom that significantly preserves or enhances pleasure, in order to improve uptake and regular use. Additional concepts that might increase uptake include attributes that increase ease-of-use for male and female condoms, for example better packaging or designs that are easier to properly apply. In addition, attributes that address and overcome cultural barriers are also desired. Proposals must (i) have a testable hypothesis, (ii) include an associated plan for how the idea would be tested or validated, and (iii) yield interpretable and unambiguous data in Phase I, in order to be considered for Phase II funding.

Several years ago a German company introduced a spray-on condom, but the product was withdrawn because men did not want to wait the full minute for the product to dry.  That, and you couldn't really travel with the applicator in your wallet.