In Astrology, Mars represents sex and aggression, while Pluto represents intensity, obsession, and transformation. Pluto is the higher octave of Mars. When your Mars makes an aspect to another person’s Pluto, an aggressive, sexual relationship is indicated.
When your Mars is conjunct, square, or opposite another person’s Pluto, an overwhelming sexual passion is indicated. Indeed, this aspect tends to intensify (Pluto) sexuality (Mars). You are strongly sexually attracted to one another, and may even become sexually obsessed with one another. You literally want to rip each other’s clothes off and merge into one another. Hot, hot hot!
On the downside, this aspect also intensifies competitiveness, drama, and conflict between the two of you. Mars and Pluto are not afraid of conflict or confrontation, and neither will put up with domination or control.
The risk of power struggles is very high with this aspect. You certainly know how to push each other’s buttons, and you tend to trigger each other’s most explosive emotions. Pluto represents extremes, so it is likely that you will push each other to the depths of anger and combativeness. Indeed, this aspect can indicate physical abuse.
Pluto is drawn to the Mars person’s strength, while Mars is attracted to Pluto’s depth. They are strongly energized by one another, but at the same time, suspicious. Pluto is secretive, while Mars is open and direct. As such, Pluto may demand to know each and every single one of Mars’ secrets, while not giving up any of his own secrets. This can anger Mars, and can lead to conflict and arguments.
The trine and sextile, on the other hand, are much easier to handle. This is one of my favorite aspects, as it provides all the sexual chemistry and fascination of all Mars-Pluto connections, without the combativeness of the hard aspects. Sex is deep, regenerative, and transformative with this aspect. Your relationship is consuming and highly intense. You work well together, and feel stronger as a couple than you do as individuals.