Lust, to some extent, is human nature and a normal reflection of physiological functions. It's not exclusively owned by men. This kind of lust in one's heart, as long as it is not reflected in words and deeds and is rationally controlled as a secret inner activity, such men will not appear lustful on the surface. But "lust" implies fondness, which is completely normal. However, if it goes overboard, it can be easily identified as a result of excessive male hormone secretion. If it becomes an obsession or addiction, people would call such individuals lechers. Or if their expressions are too intense, they might be called perverts, sex fiends, or even bone-hard sex demons. However, men with lust may have these five typical hidden mentalities.