In a study published in Physiology & Behavior, men who prefer extra spice added to their food tend to have higher testosterone levels.  The University of Grenoble researchers found that men with higher testosterone levels had a greater preference for hot sauce, and used more of it to season the potatoes eaten as part of the study. A man’s preference for capsaicin, which is a compound found in chili peppers that makes them spicy, has been linked to dominance behaviors, aggression and risk-taking in the past.  The causality in the study was was unclear.  The preference that certain males had for spicy tastes could have been driven by either physiology or environmental factors.  There could be cultural issues in this study as well.