Virgin

It is, of course, not a flaw to be sexually inexperienced...but it does limit your imagination, and thus your options, slightly. Though you might have fantasies and might turn out to be fantastically talented, you haven't yet actually had sex with anyone. So you don't really know what you're doing when it comes to that arena...but on the other hand, your (perhaps naive) enthusiasm for the undiscovered joys of life propels you to sometimes extraordinary feats of luck and courage.

Have fun with this! This is a long-game flaw; it will lock you out of some sexual options early on in the game, which is why I don't suggest combining it with a sexually themed boon. Those restrictions will drop away as the game goes on, however, and in exchange you start with 2 bonus Inspiration!