Direct definition of suggestive themes by the Entertainment Software Rating Board:
Suggestive Themes - Contains provocative references or materials.
While provocative can mean "to rouse anger" the most common definition is to deliberately cause sexual interest or desire through innuendo/metaphor, especially if that is what is written on the game. I have yet to play a game with "suggestive themes" that was meant to outright piss people off through heated subject matter; however, all of them contained sexual innuendo and lots of it.
