Masturbator's block

When you're really horny and want to masturbate, but you have no fantasy, story and/or nobody to fantasize about. It is very frustrating and annoying, considering that your libido is good and you're in the mood, but you cannot do your thing only because you don't have a sexual fantasy in mind.

God I'm so horny, but I really have nothing to fantasize about. Even porn is not doing anything to me. How the hell can I get off?

Sounds like you have Masturbator's block. ;)