LOL. Happy to hear that you like the game.
Music is not easy to deal with. I have to have license for it, for the game to be on Steam. There are many other problems with licensing. Yes, even for the "copyright free" music, as some of the devs have been finding out the hard way. For example. Copyright free, might not be a blanket license. They might also not want to have their music to be used in an adult oriented game. Even some of the most expensive music out there does not want to have anything to do with Adult games.
In short, I simply have no money to risk using any of the music out there. The game has not made any profit and my budget to make the game itself is almost zero. Just whatever I can scrape by from very low income. If the game wasn't on Steam I would have added some music. There was main menu music and outro music, before we went on Steam.