Sleep Disorder?

Sure, plenty of people sleep walk, right? Yeah, but how many go to bed clothed & wake up someplace else in the house naked. I've haven't heard of this happening to anybody else except for me. It's kinda weird, a little unnerving but exciting too. It can also be a nuisance, I mean I've awoken literally soaked in cum or in the middle of having sex with an inanimate object, once I woke up naked with a raging hard on sitting on a chair in my mom's room; good thing for me she was sleeping.I don't know what to do about it, I've tried masturbating before I go to bed but that doesn't work. Most times when this happens to me I just go back to bed. Has anybody else ever heard of this?