Thanks for your answer Ltt82, that's really helpful. One more thing, Could you tell me if the events in the game are all based in the girl stats or there are some with the goals?
Sorry to bother you again.
It's not a bother, don't worry about it.
The goals in SuperPowered aren't generally assigned to you, you have to find them on your own. For example, there's never a point in the game that tells you to specifically go to Globex and get the Mind Control power. You have to do that on your own. This is similar to the sex scenes. If you want to have sex with a girl, their lust has to be at a certain level(60, if I remember correctly, for your average girl booty call). They may also need love and trust to be a certain level as well, but generally speaking you're going to need trust and love in order to get lust up.
There are, however, also unnamed goals in the game. These are termed 'Fetishes'. In order to see certain scenes you have to go through a series of events to unlock the fetish, which will provide you with an insight to the character and a sex scene(sometimes multiple).
You can go here to learn more about the fetishes(spoiler free).
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A lot of the sex scenes are also based upon if the girl has a psychological problem(obsessive or nyphomaniac). These will happen randomly and are hard to force the trigger. They can also be dangerous. Having Maggie be a nyphomaniac can cause some serious problems because she might jump your bones whenever she sees you, which has a health cost. Health gets to 0 and...
It's an annoying mechanic, but I think there's a lot of solid reasoning behind it.