Then please correct me. As far as I can interpret the parts with Eric, he starts his "lessons" with Lisa, that will finally, if not already, get to the point where he fucks her. Showing her sex by having sex with her is his goal after all. And he helps Alice with her blog and buys her the lingerie to see her in them, don't tell me the story would settle with only that? Maybe the story isn't developed enough for sex scenes with Eric and the girls, but sooner or later it will happen, at least on the paths where he or Max don't get kicked out.
I can only interpret, because I'm on the war path and he is gone. I will never play a different path, because I don't like the other two. The story until he's gone was already annoying AF for me. So please, if you have more refined infos, then please share them and correct me.