In Astrology, Mars represents sex and aggression, while the Ascendant represents our physical appearance and the way we project ourselves to the world. Thus, when your Mars makes an aspect to another person’s Ascendant, a sexual attraction is indicated.
If your Mars conjuncts, sextiles, or trines another person’s Ascendant, you are immediately attracted to them. This is especially true for women, as Mars is one of the prime indicators of the kind of man she is attracted to. This also works well if the Mars person is a man; he finds the Ascendant person sexy and attractive, and he is turned on just by looking at her!
This aspect indicates a lively and energetic couple. The Mars person energizes the Ascendant person, and helps them achieve their goals. The Ascendant person appreciates the drive and motivation the Mars person provides them. On the downside, there may be some conflict and struggles; the Ascendant person may find the Mars person aggressive or domineering, while the Mars person may become impatient and irritable with the Ascendant person. This is especially true in the case of the conjunction; the trine and sextile are much less combative.
When your Mars opposes your partner’s Ascendant (thus conjuncts your partner’s Descendant), a mutual sexual attraction is indicated. The Mars person stimulates the Ascendant person’s self-expression. Indeed, the Ascendant person certainly gets an energy boost from the Mars person! You are likely to be competitive and combative with one another. The Mars person may try to take charge of the relationship, which can irritate the Ascendant person. The Ascendant person tends to put the Mars person first, but may be nervous to stand up for her rights in the relationship.
The square between one person’s Ascendant and another person’s Mars can be a bit trickier to deal with. In this case, arguments and conflict are likely. It is difficult for you to see eye to eye on certain issues, so when problems arise, you have different methods of dealing with them. This aspect can indicate a lack of cooperation and ego clashes.