Why might Venus conjunct Mars in a natal chart increase anxiety?

In astrology it is primarily the Moon which relates to Mind.Thus it is the afflictions to the Moon in a horoscope that would cause anxiety.The other thing to be seen in a horoscope for anxiety is the 4th house.Mars and Venus conjunction on its own has no relevance to increased anxiety unless the conjunction afflicts the 4th house in some way.The only other thing that can be said is that Mars/Venus conjunction in a horoscope does effect the life of the person in various ways such as making the person extra pionate etc.These may create psychic problems of their own.