That's why you just play the game, then haha You obviously learn from hints but you also learn from just playing. If it was a puzzle game with very intricate rules and those weren't disclosed then yeah, I'll get your point but it's not particularly that hard to figure stuff out.
For example, you find about a possible scene if you spy on the Mom while she's bathing. If Doyle (the ghost) is tagging along, he'll give a comment hinting at something. If not, the game shows you a menu prompt to focus on her Boobs, her Ass or Continue. You try that one and he mentions that it's locked, so you need a key. Then you explore trying to find it OR if you have Doyle, he'll mention about knowing where that is. Yeah, I used a lot of words so looks complicated but it's really simple once you get it. If you wanna progress, you can talk with the characters, check whether or not those interactions seem to have further ramifications (usually a red prompt says "X doesn't trust you" if you're underleveled), that's when you "level" up.
Again, key word is progression. As I mentioned before, if you cheat the levels you won't unlock much stuff cause the characters get corrupted little by little, they don't just jump to the character's cock out of nowhere.