I wonder if there are any classes, already in or maybe future ones, that are more SGR-compatible than others. The smuggler certainly strikes me as one, since he/she is basically using his/her sexuality more than once to get out of tight situations, so a natural "fluidity" so to speak seems fitting to me.
I've had a few scenes with the Bounty Hunter that if the right choice was taken it gave a hint towards SGR with Mako (at least from the BH side), but it's like one line dialogue then goes off to standard dialogue.
Didn't see any of it for Inquistor and Ashara.
All others aren't at spots to see the dialogue with possible SGRs.