My comparison was more on a general view about that subject and the exact quote from the game.
In the case of this game, the difference is, one girl providing a release to another girl while playing a role to help her to get her desire under control. Tara is not pleasing Jaye for her own pleasure(could be, we need to trust her), she doing it to help a friend... Jaye don't need to be attract to a woman to get an orgasm from Tara's fingers, because while she's doing it, she's thinking about her step brother and Tara play her part to make it "real". Jaye didn't get off because a woman was playing with her, she did get off because that woman played the role of the man she was attract/loved and help her to make it more real. The psychology of the act is really different.
Now, I'm sure you have a hard time to imagine yourself giving an handjob to one of your friend out of generosity. I struggle to the idea too, but who am I to tell someone else where the extent of their friendship should end.
Theorycrafting here: If I had a friend that loose is both arms in an accident and during an evening with alcohol the subject of sex would come out and he suggest the idea of me giving him a handjob while he watch some porn just to release him... depending of the level of friendship, I would probably do it. Well, in reality I would probably pay an escort to help him, but let say I had morality issue with that solution.
