Sex, Activities Signified
Standing
Concerns Significator
Currently States Sue Tompkins's The Contemporary Astrologer's Handbook (Flare Publications, 2006) records the modern scheme, developed after Pluto's 1930 discovery, that assigns Pluto rulership of Scorpio alongside its traditional lord Mars, reading Pluto as governing compulsion, transformation and the concealed material the eighth house already holds for sexuality; traditional practice rejects the outer planet rulerships outright and keeps Mars as Scorpio's only lord, and Tompkins records both positions have working practitioners today rather than one having displaced the other.
According To Modern Western astrology
Traditional practice rejects the outer planet rulerships outright and keeps Mars as the only lord of Scorpio, reading sexuality through Mars and Venus alone; both positions, traditional and modern, have working practitioners today.
Source The Contemporary Astrologer's Handbook, Sue Tompkins