curiurst
Where URST is defined in Urban Dictionary as the acronym for unresolved sexual tension, curiurst is the combination of curiosity, impure thoughts, anticipation and general horniness which results from considering or talking about venturing into uncharted sexual territory.
My girlfriend has been so horny since we decided to go to the swinger's BBQ even though she doesn't have any idea what will happen. She's got some serious curiurst.