There is a word for that. "Horny."
Must not have been scientifical enough for the grant committee.
Or, perhaps the Socialist Miracle that the Belgians have inflicted upon themselves and much of the rest of Europe has reduced them to such a low intellectual level that they honestly didn't understand the cause and effect relationship going on with bikinis.
But the understanding, at least an innate one of that particular interrelationship between bikinis and arousal, does not require intellect, just glands which generate testosterone. Perhaps the researchers are missing something else...