title: My husband just turned 74. With every passing birthday, he seems to have less energy and is less interested in sex. Is this normal?
mesh_terms: D000368:Aged; D000375:Aging / Q000502:physiology*; D006801:Humans; D007006:Hypogonadism / Q000150:complications*; D008297:Male; D012725:Sexual Behavior; D013739:Testosterone / Q000172:deficiency*
chemical_list: D013739:Testosterone