It's not even the only game that the creator did with the same behaviour.
They usually do that when there are more that one girl that have sex with a boy putting the gay term as an umbrella term.
But it's still wrong since lesbians don't like dick and gives a bad image of LGBTQ community, portraiting a Straight male kink that is actually unreal and gives a wrong rappresentation of the term.
It's a "soft discrimination" use of the term and i feel like this is wrong since the LGBT community is poorly rappresented in the videogame world and the moment they are inside a game (adult content or not) it's wrongly made.