It might be asshole. It might be alpha. It's some kinda confidence points for sure though. The premise and the whole set up is that the MC is a beta loser of sorts at the beginning of the game. The choices that give ED_A are basically the more outgoing/alpha/forceful/pervy stuff. Take that as you will. I don't remember the details, but if this was during the first meeting with Lucy, it makes sense that you get the "alpha" points for this. Asking someone you just met if she is a lesbian as a joke or seriously require some level of confidence.
Don't get hung up on the name of the variable. The game only really has 2 stats pertaining to the MC. Ed_A is leading him to the direction of confident, powerful, "alpha," don't take shit from people, stand up for yourself, exploit others, etc etc. Ed_L is sending him to the direction of simpy, romantic, Lover, "Loser," more meek, don't speak out too much, accommodating, etc. Both variables are covering a wide range of traits roughly in the same group.