So it seems the only one of Roy's lovers that would possibly try to stop me from groping him is Ed.

And again, I seriously doubt that. Roy gets hit on by far too many people for Ed to fly off the handle like that all the time. Roy was feeling down, needed a little pick-me-up. If anyone were to get the alchemic slap/finger, it would be Roy. How am I even supposed to know Roy is involved with someone when he lets me grope him like that? Maybe Ed just wants to join in?

*I spend too much time with Ling, apparently*