The rate of heartbeat depends on the size of body in general. As women’s bodies are smaller on average than men’s, their hearts beat faster.
It’s not because the better sense of smell. Women tend to differentiate smells better than men and detect specific smells correctly.
The trick is women listen with both sides of brain while men use only left side of brain for listening.
Women can drink the same amount of alcohol but will have a higher alcohol level in blood than men do. Thus, we have lower alcohol tolerance, we are prone to become alcohol addicts sooner than men and suffer more from hangovers. In other words, drinking is not women’s cup of tea.