Quick clarification on the cognitive enhancement study: the cohort was specifically men aged 50-75 who had both mild cognitive impairment AND erectile dysfunction. This dual condition matters because it suggests the mechanism might be vascular - both cognitive decline and ED in this age group often share common pathways like reduced blood flow and endothelial dysfunction. If the intervention improved both simultaneously, it points to systemic vascular improvements rather than just localized effects. Worth noting this isn't generalizable to healthy populations or women yet.