Countless factors may (and may not) contribute to a mosquito’s thirst for your blood over others. Roughly 500 music fans volunteered to not only answer the survey, but stick their arms into a custom-designed cage buzzing with hungry mosquitos. The team then recorded videos of the mosquito responses compared to responses to a sugar feeder placed on the other side of the cage. Those who drank beer and had sex the night before the experiment were around 1.35 times more attractive to mosquitos than the more sober, abstinent volunteers. The researchers’ self-titled “Mosquito Magnet Trial” is the largest study of its kind to date to their knowledge.