Welcome to the forum.
Abieham is right. The problem that we all have is called "lust" and lust can manifest itself in many different ways for different people. It doesn't matter if we fantasize about body parts, fetishes or aliens. If we are fantasizing sexually then we are lusting and if we can't stop then the GYE community is here to provide support and solutions.
Contact any member anonymously with any questions through the forum, the chat or through private messaging.
Keep coming back and G-d bless.