Mass Sign and Effects

Since I met the Maxwell equations (oh God, half a century ago) I wonder if given the similarity between electrostatic and gravitational formels there would exist a non conservative, rotational field derived from masses in movement. As all masses have same sign and are attracted each other, this field, let us call it "gyromasic", would behave opposite to magnets i.e. attracting equal poles. Similarly, two masses moving along parallel ways in the same direction would repel instead of being attracted as is the case with electric charges of same sign. Given the (relative) weakness of gravitational forces the gyromasic field would be rather difficult to detect, except may be in astronomical environements. The whole is consistent with

a) gravitational waves following Maxwell-like equations where a gyromasic permeability should be either introduced or deduced supposing that the wave speed equates light speed.

b) galaxy rotation where the gyromasic field created by the galactic nucleus would interactuate with the intrinsic and orbital gyromasic field of each star (no need of dark mass). Stars far from galaxy center spread out because of same effect..

c) planet orbits as well as Saturn/ Jupiter rings (no mass accretion in rings, ringless orbits).

This all is pure speculation but in my humble opinion not far from what one can read about negative masses, modified Newton dinamycs or propelentless drive. In any case, funny.