You know there are some games exist even without "cliche hypno dick", that have right amount of both story & sexual content too with all characters? Yeah, those games won't show vaginal sex right from 1st episode, but yes, within some updates, dev/writer will make sure to make the story where it makes "sense" for sexual scenes to be made on that situation with a enough foreplay, long duration scenes that leads to vaginal sex at last (within few updates).
It's all depend on writer's skills, talent, interest, time & resources. We don't have to wait years for sex and also can enjoy the story. Good isn't it?