[...] Basically Fate/Stay Night was a eroge so it needed sex scenes, so they made that transferring mana was done by having sex.
Hollow/Ataraxia was a little better in that regard: the sex scenes are all "optional", outside of the main story.
There probably were other methods, but it is the fact that in all others games/series somehow they never used it again and just went for traditional mana transfer. So even if it is fanservice, they still decided to choose this one.
Iirc, some "reasons" were actually given for why this specific method was needed in the VN's case.
last edited at Oct 1, 2015 4:40PM