I repeat an earlier post:
A switch with 4 settings (all romances on, SGRs on, OGRs on, no romances on) would not be discriminatory, because it treats all players and all types of romances equally.
A toggle that was exclusively for switching SGRs on or off would be discriminatory. To understand why, imagine the reverse: SGRs always on, but a toggle that would allow OGRs to be switched on and off.
I would take that further and say the only way it would be non-discriminatory would be to lump all relationships together in the toggle. The only toggle available would turn ALL relationships on or off.